toolchain: add a C++ wrapper

We need some extra flags when building C++, so create a new wrapper for it.

BUG=24803386
TEST=emerge glog/gflags works

Change-Id: I795e1bfd28c78150a2950b0c6b6e4d2b225406fd
7 files changed
tree: 10880f023c9dcccff568a87d861c325b6817c4aa
  1. portage/
  2. tests/
  3. toolchain/
  4. 3rd-party-binary.mk
  5. Android.mk
  6. NOTICE
  7. TODO