Fix install for out of tree builds
Fix install for out of tree builds

Signed-off-by: Sebastian Ramacher <63df716952f6985d63bd730444128636613d6384@debian.org>

metabrainz/libcoverart,metabrainz/libcoverart,metabrainz/libcoverart,sebastinas/libcoverart,sebastinas/libcoverart,sebastinas/libcoverart