Further work on emba tests

Further work on emba tests

* .gitlab-ci.yml (test-all): Remove after_script.
(test-filenotify-gio): Remove after_script and when.  Add
src/gfilenotify.c as dependent change.  Use filenotify-tests.log
make target.

* test/lisp/filenotify-tests.el (file-notify-test03-events)
(file-notify-test05-file-validity)
(file-notify-test06-dir-validity)
(file-notify-test07-many-events)
(file-notify-test09-watched-file-in-watched-dir): Check just for
(getenv "EMACS_EMBA_CI").