eudev: fix build with <2.6.34 kernels

Add missing defines so eudev builds for older kernels, not having
BTN_TRIGGER_HAPPY (2.6.34) or INPUT_PROP_MAX (2.6.38).

Patch submitted upstream: https://github.com/gentoo/eudev/pull/139

[Peter: clarify versions]
Signed-off-by: Gustavo Sverzut Barbieri <barbieri@profusion.mobi>
Reviewed-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/eudev/0002-missing-defines-for-old-kernels.patch

@@ -0,0 +1,44 @@
+From c0f63850ad29ec978d070a08b816dc2bfca337e3 Mon Sep 17 00:00:00 2001
+From: Gustavo Sverzut Barbieri <barbieri@profusion.mobi>
+Date: Fri, 30 Dec 2016 11:28:41 -0200
+Subject: [PATCH] udev-builtin-input_id.c: add missing kernel header defines.
+
+Add missing defines so eudev builds for older kernels such as 2.6
+
+Signed-off-by: Gustavo Sverzut Barbieri <barbieri@profusion.mobi>
+---
+ src/shared/missing.h             | 8 ++++++++
+ src/udev/udev-builtin-input_id.c | 1 +
+ 2 files changed, 9 insertions(+)
+
+diff --git a/src/shared/missing.h b/src/shared/missing.h
+index 5ad599795..bebbb42be 100644
+--- a/src/shared/missing.h
++++ b/src/shared/missing.h
+@@ -171,3 +171,11 @@ static inline int name_to_handle_at(int fd, const char *name, struct file_handle
+     (char *)memcpy(__new, __old, __len); \
+   })
+ #endif
++
++#ifndef BTN_TRIGGER_HAPPY
++#define BTN_TRIGGER_HAPPY 0x2c0
++#endif
++
++#ifndef INPUT_PROP_MAX
++#define INPUT_PROP_MAX 0x1f
++#endif
+diff --git a/src/udev/udev-builtin-input_id.c b/src/udev/udev-builtin-input_id.c
+index b14190e42..ca545be5d 100644
+--- a/src/udev/udev-builtin-input_id.c
++++ b/src/udev/udev-builtin-input_id.c
+@@ -32,6 +32,7 @@
+ 
+ #include "udev.h"
+ #include "util.h"
++#include "missing.h"
+ 
+ /* we must use this kernel-compatible implementation */
+ #define BITS_PER_LONG (sizeof(unsigned long) * 8)
+-- 
+2.11.0
+