llvm, libc++ and python version

[Brook Milligan <brook%nmsu.edu@localhost>]

As I am putting together a lang/libc++ package, I have noticed that llvm requires python2.7 as a dependency; python3 will not work according to comments in the CMakeLists.txt file.  Should we add

	PYTHON_VERSIONS_ACCEPTED=	27

to the llvm packages?

Cheers,
Brook