swift234

Fix getRValueType() to not strip off @inout types, only @lvalue types.
- Introduce a new TypeBase::getInOutObjectType() that strips off @inout types
- Switch stuff that is calling getRValueType() to call getInOutObjectType()
  when they are stripping @inout, not @lvalue (this is primarily around
  stuff working with self)
- Update testcases, some diagnostics improve around & handling.

This fixes rdar://15708430 and rdar://15729093.



Swift SVN r11794