Make libc++ static library saner on toolchain and fix link options in testit_android

Change-Id: I1ee7f8d5c1eddd9da5eebe35018ec81ee783d8c5
Fixup comments regarding libstdc++ location.

Change-Id: Ib1adf3d262761fb990fc068b6a1b9c2539f1b038
Merge pull request #121 from awong-dev/static_build

Make libc++_static.a saner in toolchain and fix link options in testit_android.