llvm-lit is set to ONLY_FOR_ARCHS LLVM_ARCHS. But it's
got COMPILER of base-clang with no others. 

So on sparc64 dpb ends up trying base-gcc to build it, which of course
won't work.

So should the ONLY_FOR_ARCHS be changed to CLANG_ARCHS?
Or should COMPILER be changed to base-clang ports-clang?

The current situation doesn't make sense....

--Kurt