Update git submodules

* Update platform/system/bt from branch 'master'
  to fd7b7ffd29e3e8ecd9a8d6b165e0802e1a551075
  - Merge "Controller: Debug message for unuspported opcodes"
  - Controller: Debug message for unuspported opcodes
    
    Bug: 181159438
    Test: cert/run
    Tag: #gd-refactor
    Change-Id: Iebee00b614da04cac77f9b2a8c104f16c97a8252
    
1 file changed