Always use internal fnmatch, not system

src/posix.h

@@ -10,6 +10,7 @@
 #include "common.h"
 #include <fcntl.h>
 #include <time.h>
+#include "fnmatch.h"
 
 #ifndef S_IFGITLINK
 #define S_IFGITLINK 0160000

src/unix/posix.h

@@ -7,13 +7,6 @@
 #ifndef INCLUDE_posix__w32_h__
 #define INCLUDE_posix__w32_h__
 
-#if !defined(__sun) && !defined(__amigaos4__)
-#	include <fnmatch.h>
-#	define p_fnmatch(p, s, f) fnmatch(p, s, f)
-#else
-#	include "compat/fnmatch.h"
-#endif
-
 #include <stdio.h>
 
 #define p_lstat(p,b) lstat(p,b)

src/win32/posix.h

@@ -8,7 +8,6 @@
 #define INCLUDE_posix__w32_h__
 
 #include "common.h"
-#include "compat/fnmatch.h"
 #include "utf-conv.h"
 
 GIT_INLINE(int) p_link(const char *old, const char *new)