Driver: Tweak option naming/def:
 - Use OPT_ prefix for ids.

 - Reference groups and aliases by shortend id (on the theory that
   this is more readable).

 - Rename the special option ids to more protected names.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@66767 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed