[gnome-music] (4 commits) Non-fast-forward update to branch sam/grilo-subproject

[Sam Thursfield <sthursfield src gnome org>]

The branch 'sam/grilo-subproject' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  8460995... build: Allow building grilo and grilo-plugins as Meson subp

Commits added to the branch:

  a65f443... mpris: Listen to the changes on the player playlist (*)
  6dee137... mpris: Emit TrackListReplaced signal when tracklist size ch (*)
  93cd2bb... mpris: Rename update_songs_list to update_tracklist (*)
  08798b2... build: Allow building grilo and grilo-plugins as Meson subp

(*) This commit already existed in another branch; no separate mail sent