Fix all the test case breakages caused by folks writing tests all over the place that depended explicitly 
on the output of "break set".  Please don't do this sort of thing!!!!!

llvm-svn: 164433

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