Driver: Move Compilation::Execute to Driver::ExecuteCompilation.
 - The Compilation is just a helper class, it shouldn't have that amount of
   logic in it.

 - No functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@74634 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed