Add version identifier for Nvidia PTX.
Merge branch 'master' into merge-2.064
NVPTX/NVPTX64 is not available in LLVM 3.1.
Add new architecture aarch64_be.
Merge branch 'master' into merge-2.064
Merge branch 'merge-2.064' into merge-2.065

Conflicts:
	dmd2/cond.c