util/lint: Update final newline check

- Exclude .png and .patch files.
- Turn into a lint-stable test.

Change-Id: I4a5c77d7856bc5017ba441d458378b4837c1c7d5
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/20706
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

0 files changed, 0 insertions, 0 deletions