We're compiling .S files, so use CPPAS instead of CC to compile since the point of CPPAS is to preprocess+assemble .S files.
Compiling the basiccrt .S files missed an include to the local bfin/ headers causing the build to break when installing anew. Reported-by: Jeff Law <jeffreyalaw@gmail.com>
Avoid a recursive make to speed things up a bit.
Mike Frysinger