Add COMMITMENT file as part of GPL Common Cure Rights Commitment
Add COMMITMENT file as part of GPL Common Cure Rights Commitment

This is part of more broader commitment Red Hat along with IBM, Google, and
Facebook made in November 2017.

More on this can be found online:

https://www.redhat.com/en/blog/fostering-greater-open-source-development &
https://www.redhat.com/en/about/gplv3-enforcement-statement

hughsie/appstream-glib,hughsie/appstream-glib,hughsie/appstream-glib