[AArch64] Add support for NEON scalar signed saturating absolute value and
scalar signed saturating negate instructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192733 91177308-0d34-0410-b5e6-96231b3b80d8
Reformat.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192735 91177308-0d34-0410-b5e6-96231b3b80d8
Separating ELF and MachO stub info functions for RuntimeDyld

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192737 91177308-0d34-0410-b5e6-96231b3b80d8