Update git submodules

* Update hardware/libhardware from branch 'master'
  to a5c2957f637a10915936bd6ed4da358541db5472
  - Merge "r_submix: Fix compilation for non-default configurations"
  - r_submix: Fix compilation for non-default configurations
    
    Fix compilation for:
      #define ENABLE_LEGACY_INPUT_OPEN 0
      #define ENABLE_RESAMPLING 0
    
    Test: make
    Change-Id: I11a868c49181b35d3b85ea62a372a94a1b589bc1
    
1 file changed