Add TestInferiorChanged.py to test that lldb reloads the inferior after it was...

Add TestInferiorChanged.py to test that lldb reloads the inferior after it was changed during the debug session.
First, main.c causes a crash, the inferior then gets re-built with main2.c which is not crashing.

Add Base.cleanup(self, dictionary=None) for platform specfic way to do cleanup after build.
This plugin method is used by the above test case to cleanup the main.c build before rebuild for main2.c.

llvm-svn: 137500