Cleanup of IRForTarget.  Removed some relics of
the time when the IRInterpreter ran inside
IRForTarget.


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@185088 91177308-0d34-0410-b5e6-96231b3b80d8
A bit more cleanup on the process_events.py to use best practices for event handling.



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@185089 91177308-0d34-0410-b5e6-96231b3b80d8