Don't override PATH_MAX, glibc with FORTIFY_SOURCE exactly wants
it as 4096 bytes at least, otherwise it will abort().

	-- xtraeme

--- openbsd-compat/defines.h.orig	2015-04-01 12:25:34.304411927 +0200
+++ openbsd-compat/defines.h	2015-04-01 12:26:10.832810710 +0200
@@ -65,10 +65,6 @@ enum
  * Looks like ugly, but MAX_IMSGSIZE equals 16384,
  * and if we don't care it will overflow for some struct
  */
-#if PATH_MAX > 1024
-#  undef  PATH_MAX
-#  define PATH_MAX 1024
-#endif
 
 #if MAXPATHLEN > 1024
 #  undef  MAXPATHLEN