Make the libc++ libraries the primary.

The stlport linked libraries are compiled with the NDK, so do not need
to be removed. They are being renamed to libstlport_ndk to make their
intended use explicit, and should not be used for platform tests.

Bug: 15193147
Change-Id: I871e765ae1cd006971542f3926509b85f7edb7e7
2 files changed