Update git submodules

* Update external/dtc from branch 'master'
  to 38bd6fab2a0eb8a39a1f563e29a3412205d9b5c8
  - dtc: add fdtget in Android.bp
    
    Bug: 128837155
    Test: execute fdtget to read out the DT settings.
    Change-Id: I7149ecd6a9b5aeedd0a2cf21eee692e77f03a8e1
    
1 file changed