Initialize TempFileHandle.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186684 91177308-0d34-0410-b5e6-96231b3b80d8
[SystemZ] Add NGRK, OGRK and XGRK

Like r186683, but for 64 bits.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186685 91177308-0d34-0410-b5e6-96231b3b80d8