tests: use 'hghave unix-permissions' for tests that really use chmod
chmod of helper scripts is not included.
tests that exercise the x bit in the file system uses 'hghave execbit'.
[ original upstream message ]
tests: make '(esc)' matching in run-tests.py work as intended
The code for match on (esc) lines didn't work, and it would thus always end up
emitting another suggestion ... which however would match the old one.
[ original upstream message ]