Update Cygwin's fnmatch to latest from FreeBSD.

* collate.h (__collate_load_error): Convert to extern declaration.
        * globals.cc (__collate_load_error): Define and initialize here.
        * libc/fnmatch.c: Update to latest from FreeBSD.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

winsup/cygwin/globals.cc

@@ -103,6 +103,9 @@ char NO_COPY almost_null[1];
 
 extern "C" {
 
+/* We never have a collate load error. */
+const int __collate_load_error = 0;
+
   /* Heavily-used const UNICODE_STRINGs are defined here once.  The idea is a
      speed improvement by not having to initialize a UNICODE_STRING every time
      we make a string comparison.  The _RDATA trick allows defining the strings