Update mkvtoolnix to 38.0.0
Summary:
Release notes available here
Signed-off-by: Pierre-Yves <pyu@riseup.net>
Test Plan:
- mkvinfo test.mkv
- open medias in MKVToolNix GUI
Reviewers: Triage Team, JoshStrobl
Reviewed By: Triage Team, JoshStrobl
Subscribers: JoshStrobl
Differential Revision: https://dev.getsol.us/D7341