Update git submodules

* Update system/core from branch 'master'
  to 93619e373a60c967623e064f9aa5424d4b38e8e2
  - Merge "[adb] Add a getter for native Win32 file handle"
  - [adb] Add a getter for native Win32 file handle
    
    + adb_pread() and adb_pwrite() functions for simpler cross
      platform file operations
    
    Test: builds
    Change-Id: I7e2b23e1da79acd7be974a3d7e1be0fb77d7d2c6
    
1 file changed