Update git submodules

* Update trusty/user/app/sample from branch 'master'
  to a62e65ff52b3feb8d2d46ddece884f0943d41bb0
  - [libcxx-test] make constants unsigned to match values
    
    Bug: 138738352
    Change-Id: I5d0c1803afed6545bba75cbc7fa9ba9297a4dc8d
    
1 file changed