Merge branch 'ee/clean-remove-dirs'

Test updates for Windows.

* ee/clean-remove-dirs:
  t7300-clean: require POSIXPERM for chmod 0 test

t/t7300-clean.sh

@@ -499,7 +499,7 @@ test_expect_success 'should not clean submodules' '
 	test_path_is_missing to_clean
 '
 
-test_expect_success 'should avoid cleaning possible submodules' '
+test_expect_success POSIXPERM 'should avoid cleaning possible submodules' '
 	rm -fr to_clean possible_sub1 &&
 	mkdir to_clean possible_sub1 &&
 	test_when_finished "rm -rf possible_sub*" &&