Several things...

- Implement RewritePropertySetter(). While the routine is simple, there were some tricky changes to RewriteFunctionBodyOrGlobalInitializer(), the main rewriter loop. It also required some additional instance data to distinguish setters from getters, as well as some changes to RewritePropertyGetter().

- Implement FIXME: for pretty printing ObjCPropertyRefExpr's.

- Changed ObjCPropertyRefExpr::getSourceRange() to point to the end of the property name (not the beginning). Also made a minor name change from "Loc"->"IdLoc" (to make it clear the Loc does not point to the ".").
 

llvm-svn: 60540