VMS: Copy __DECC_INCLUDE_{PROLOGUE,EPILOGUE}.H to more places

Every inclusion directory related to a library we build need these two
files.  That signals to any other module using anything from these
libraries what to expect in terms of case sensitivity as well as how
long symbol names are dealt with.

Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/15341)

apps/include/__DECC_INCLUDE_EPILOGUE.H

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+/*
+ * This file is only used by HP C/C++ on VMS, and is included automatically
+ * after each header file from this directory
+ */
+
+/*
+ * The C++ compiler doesn't understand these pragmas, even though it
+ * understands the corresponding command line qualifier.
+ */
+#ifndef __cplusplus
+/* restore state.  Must correspond to the save in __decc_include_prologue.h */
+# pragma names restore
+#endif

apps/include/__DECC_INCLUDE_PROLOGUE.H

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+/*
+ * This file is only used by HP C/C++ on VMS, and is included automatically
+ * after each header file from this directory
+ */
+
+/*
+ * The C++ compiler doesn't understand these pragmas, even though it
+ * understands the corresponding command line qualifier.
+ */
+#ifndef __cplusplus
+/* save state */
+# pragma names save
+/* have the compiler shorten symbols larger than 31 chars to 23 chars
+ * followed by a 8 hex char CRC
+ */
+# pragma names as_is,shortened
+#endif

providers/common/include/prov/__DECC_INCLUDE_EPILOGUE.H

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+/*
+ * This file is only used by HP C/C++ on VMS, and is included automatically
+ * after each header file from this directory
+ */
+
+/*
+ * The C++ compiler doesn't understand these pragmas, even though it
+ * understands the corresponding command line qualifier.
+ */
+#ifndef __cplusplus
+/* restore state.  Must correspond to the save in __decc_include_prologue.h */
+# pragma names restore
+#endif

providers/common/include/prov/__DECC_INCLUDE_PROLOGUE.H

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+/*
+ * This file is only used by HP C/C++ on VMS, and is included automatically
+ * after each header file from this directory
+ */
+
+/*
+ * The C++ compiler doesn't understand these pragmas, even though it
+ * understands the corresponding command line qualifier.
+ */
+#ifndef __cplusplus
+/* save state */
+# pragma names save
+/* have the compiler shorten symbols larger than 31 chars to 23 chars
+ * followed by a 8 hex char CRC
+ */
+# pragma names as_is,shortened
+#endif

providers/implementations/include/prov/__DECC_INCLUDE_EPILOGUE.H

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+/*
+ * This file is only used by HP C/C++ on VMS, and is included automatically
+ * after each header file from this directory
+ */
+
+/*
+ * The C++ compiler doesn't understand these pragmas, even though it
+ * understands the corresponding command line qualifier.
+ */
+#ifndef __cplusplus
+/* restore state.  Must correspond to the save in __decc_include_prologue.h */
+# pragma names restore
+#endif

providers/implementations/include/prov/__DECC_INCLUDE_PROLOGUE.H

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+/*
+ * This file is only used by HP C/C++ on VMS, and is included automatically
+ * after each header file from this directory
+ */
+
+/*
+ * The C++ compiler doesn't understand these pragmas, even though it
+ * understands the corresponding command line qualifier.
+ */
+#ifndef __cplusplus
+/* save state */
+# pragma names save
+/* have the compiler shorten symbols larger than 31 chars to 23 chars
+ * followed by a 8 hex char CRC
+ */
+# pragma names as_is,shortened
+#endif