Adapt test cases for Oniguruma 6.9.4

Apparently, bug 78633 has now really been fixed; the former fix only
catered to the buffer overflow, but yielded a wrong result.  Also,
the order of the named captures has been fixed.

ext/mbstring/tests/bug78633.phpt

@@ -7,7 +7,12 @@ if (!function_exists('mb_eregi')) die('skip mb_eregi function not available');
 ?>
 --FILE--
 <?php
-var_dump(mb_eregi(".+Isssǰ", ".+Isssǰ"));
+$res = mb_eregi(".+Isssǰ", ".+Isssǰ");
+if ($res === 1 || $res === false) {
+    echo "ok\n";
+} else {
+    var_dump($res);
+}
 ?>
 --EXPECT--
-bool(false)
+ok

ext/mbstring/tests/mb_ereg_search_named_subpatterns_1.phpt

@@ -4,6 +4,7 @@ Testing mb_ereg_search() named capture groups
 <?php
 if (!extension_loaded('mbstring')) die('skip mbstring not enabled');
 function_exists('mb_ereg_search') or die("skip mb_ereg_search() is not available in this build");
+version_compare(MB_ONIGURUMA_VERSION, '6.9.4', '<') or die("skip requires oniguruma < 6.9.4");
 ?>
 --FILE--
 <?php

ext/mbstring/tests/mb_ereg_search_named_subpatterns_2.phpt

@@ -0,0 +1,32 @@
+--TEST--
+Testing mb_ereg_search() named capture groups
+--SKIPIF--
+<?php
+if (!extension_loaded('mbstring')) die('skip mbstring not enabled');
+function_exists('mb_ereg_search') or die("skip mb_ereg_search() is not available in this build");
+version_compare(MB_ONIGURUMA_VERSION, '6.9.4', '>=') or die("skip requires oniguruma >= 6.9.4");
+?>
+--FILE--
+<?php
+    mb_regex_encoding("UTF-8");
+    mb_ereg_search_init('  中国？');
+    mb_ereg_search('(?<wsp>\s*)(?<word>\w+)(?<punct>[？！])');
+    var_dump(mb_ereg_search_getregs());
+?>
+--EXPECT--
+array(7) {
+  [0]=>
+  string(11) "  中国？"
+  [1]=>
+  string(2) "  "
+  [2]=>
+  string(6) "中国"
+  [3]=>
+  string(3) "？"
+  ["wsp"]=>
+  string(2) "  "
+  ["word"]=>
+  string(6) "中国"
+  ["punct"]=>
+  string(3) "？"
+}