Bug#1118470: flac: provide a .cmake file

[Fabian Greffrath]

Looks like that file isn't generated, but just 
copied:https://salsa.debian.org/multimedia-team/flac/-/blob/master/src/libFLAC++/libFLAC++.m4?ref_type=headsVon
 meinem/meiner Galaxy gesendet