Add "native" to config.available_features, to make it easier to disable non-x-compile-safe tests

Patch by Artyom Skrobov!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190679 91177308-0d34-0410-b5e6-96231b3b80d8
[ARMv8] Emit the proper .fpu directive.

Patch by Bradley Smith!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190683 91177308-0d34-0410-b5e6-96231b3b80d8