Bump the default C++ standard up to C++14.

This also drops the NDK default back to C++98 (or C++11 for code using
libc++). The platform NDK build should match the normal NDK build.

Bug: http://b/23043421
Change-Id: I3a336767ce271e84f4dfdebdadb3a98e5689def9
2 files changed