[BZ#790871] build: Install appstream metadata to non-deprecated location
Submitted by Jeremy Bicha
Link to original bug (#790871)
Description
/usr/share/metainfo/ has been the preferred location for appstream metadata since appstream 0.9.4 a year and a half ago
https://www.freedesktop.org/software/appstream/docs/chap-Metadata.html#spec-component-location