libchrome: Add files needed by some veyron variants on Chrome OS

These files are needed for Chrome IPC. These will be compiled on
Chrome OS, so no impact on AOSP.

BUG: 26772882
TEST: make -j32 for dragonboard
      ./build_packages on CrOS for various boards.

Change-Id: Ibca0a04692a59f245cab2d5c9707cff109ca144f
8 files changed