Update git submodules

* Update trusty/user/base from branch 'master'
  to 1b5a3949fc3311ecc2c862068795f2766e3e3601
  - googletest: Add missing dependency on libcxx
    
    This dependency was missing but the build was including it anyway and
    happened to work.
    
    Test: build.py
    Bug: None
    Change-Id: Ie53ce96eb31b2ba01580aa90ae433f1083039c9f
    
1 file changed