Protobuf 3.15 adds a namespace alias for "pb" that conflicts with
Clementine's. Modify Clementine to use "cpb".
Patch provided by @ahesford
Reference: 5c028d6cf4/src/google/protobuf/port.h (L44)
Current VGM format implementation in GStreamer (gstgme) only supports Sega Geneses (Mega Drive) and Sega Master System emulation.
GStreamer also cannot handle the VGZ format (a shorthand for vgm.gz, a gzipped archive that contains a song) which means
that users will currently have to extract the contents of their VGZ files to individual vgm files.