fixup! t1006: accommodate for symlink support in MSYS2

Author: dscho

t/t1006-cat-file.sh

@@ -1048,7 +1048,7 @@ test_expect_success 'git cat-file --batch-check --follow-symlinks works for out-
 	echo .. >>expect &&
 	echo HEAD:dir/subdir/out-of-repo-link-dir | git cat-file --batch-check --follow-symlinks >actual &&
 	test_cmp expect actual &&
-	if test_have_prereq MINGW
+	if test_have_prereq MINGW,SYMLINKS
 	then
 		test_write_lines "symlink 2" ..
 	else