Bug #:

Submitted by:
Reviewed by:
This check-in should finally "nail" complex pointer assignments (involving
qualifiers, etc.).
- Replaced pointerTypeQualifiersAlign() with CheckPointerTypesForAssignment()
This also simplified UsualAssignmentConversions().
- Fixed Type::pointerTypesAreCompatible() and Type::typesAreCompatible()
to closely reflect the spec. They were (unfortunately) compensating for some of the
missing logic in the assignment checking code.

llvm-svn: 39440