Update git submodules

* Update docs/submodules/music.git from branch 'master'
  to 536479c24a19d0f7a5df519c96ea0c36314bddc9
  - Frankfurt Release Notes
    
    Issue-ID: MUSIC-590
    Signed-off-by: Tschaen, Brendan <ctschaen@att.com>
    Change-Id: Idc511e54dbee150ecd07d024c4dce3765791a8dd
    
1 file changed