t3070: Disable some failing fnmatch tests

The failing tests make use of a POSIX character class, '[:xdigit:]'
in this case, which some versions of the fnmatch() library function
do not support. In the spirit of commit f1cf7b7 ("t3070: disable
unreliable fnmatch tests", 15-10-2012), we disable the fnmatch() half
of these tests.

Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Acked-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: Ramsay Jones

t/t3070-wildmatch.sh

@@ -120,9 +120,9 @@ match 0 x '1' '[[:digit:][:upper:][:spaci:]]'
 match 1 x ' ' '[[:digit:][:upper:][:space:]]'
 match 0 x '.' '[[:digit:][:upper:][:space:]]'
 match 1 x '.' '[[:digit:][:punct:][:space:]]'
-match 1 1 '5' '[[:xdigit:]]'
-match 1 1 'f' '[[:xdigit:]]'
-match 1 1 'D' '[[:xdigit:]]'
+match 1 x '5' '[[:xdigit:]]'
+match 1 x 'f' '[[:xdigit:]]'
+match 1 x 'D' '[[:xdigit:]]'
 match 1 x '_' '[[:alnum:][:alpha:][:blank:][:cntrl:][:digit:][:graph:][:lower:][:print:][:punct:][:space:][:upper:][:xdigit:]]'
 match 1 x '_' '[[:alnum:][:alpha:][:blank:][:cntrl:][:digit:][:graph:][:lower:][:print:][:punct:][:space:][:upper:][:xdigit:]]'
 match 1 x '.' '[^[:alnum:][:alpha:][:blank:][:cntrl:][:digit:][:lower:][:space:][:upper:][:xdigit:]]'