We now rely instead on the content of $NDK/sources/cxx-stl/system/include
that is automatically used if a module has C++ sources.
Change-Id: I4319d9260fcf9fb31c59c2f21ca64b536725d4f5
The idea is to allow developing the NDK in the open, while
having the platforms and samples under a private branch until
the corresponding release are open-sourced.
Change-Id: Iee995fb6c4d3ee1387dea7486e599e079c9e4c6d