Migrate, FileCheckize and update:

2007-04-03-ObjcEH.m
2007-05-02-Strong.m
2007-10-18-ProDescriptor.m
2007-10-23-GC-WriteBarrier.m
2008-10-3-EhValue.m
2008-11-12-Metadata.m
2008-11-24-ConstCFStrings.m

from llvm/test/FrontendObjC.

llvm-svn: 138172