[Support][ErrorOr] Make old gcc happy.

Apparently this is how C++98 worked pre-DR. (Thanks Richard).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173203 91177308-0d34-0410-b5e6-96231b3b80d8
Add instruction encodings / disassembly support for u10 / lu10 instructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173204 91177308-0d34-0410-b5e6-96231b3b80d8