[Orc] Re-commit r266581 with fixes for MSVC, and format cleanups.

Fixes:

(1) Removes constexpr (unsupported in MSVC)
(2) Move constructors (remove explicitly defaulted ones)
(3) <future> - Add warning suppression for MSVC.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@266663 91177308-0d34-0410-b5e6-96231b3b80d8
12 files changed