Treat AppleClang the same as Clang when specifying compiler warnings.
Treat AppleClang the same as Clang when specifying compiler warnings.

lightstep/lightstep-tracer-cpp,lightstep/lightstep-tracer-cpp,lightstep/lightstep-tracer-cpp,lightstep/lightstep-tracer-cpp,lightstep/lightstep-tracer-cpp