test: t4102-apply-rename fails with strict umask.

We checked the result of patch application for full permission bits,
when the only thing we cared about was to make sure the executable
bit was correctly set.

Noticed by Peter Baumann.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

t/t4102-apply-rename.sh

@@ -32,6 +32,6 @@ test_expect_success apply \
     'git-apply --index --stat --summary --apply test-patch'
 
 test_expect_success validate \
-    'test -f bar && ls -l bar | grep "^-..x..x..x"'
+    'test -f bar && ls -l bar | grep "^-..x......"'
 
 test_done