Build JNI portions with BORINGSSL_NO_CXX.
Build JNI portions with BORINGSSL_NO_CXX.

BoringSSL plans on adding unique_ptr-based C++ scopers provided the
compiler supports C++11. Conscrypt, though it builds with C++11, builds
without an STL. Add a #define to suppress BoringSSL's scopers.

Change-Id: I1e5895b809ac3079d5e598aebb806f6770e4d702

google/conscrypt,google/conscrypt,google/conscrypt,google/conscrypt,google/conscrypt,google/conscrypt