[mips] -mno-shared should only be given to the assembler when -fPIC/-fpic/-fPIE/-fpie is not in effect.

This fixes compiler recursion on MIPS32r2.



git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@213741 91177308-0d34-0410-b5e6-96231b3b80d8
AArch64: update Clang for merged arm64/aarch64 triples.

The main subtlety here is that the Darwin tools still need to be given "-arch
arm64" rather than "-arch aarch64". Fortunately this already goes via a custom
function to handle weird edge-cases in other architectures, and it tested.

I removed a few arm64_be tests because that really isn't an interesting thing
to worry about. No-one using big-endian is also referring to the target as
arm64 (at least as far as toolchains go). Mostly they date from when arm64 was
a separate target and we *did* need a parallel name simply to test it at all.
Now aarch64_be is sufficient.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@213744 91177308-0d34-0410-b5e6-96231b3b80d8