[OpenCL] Add generic AS to 'this' pointer

Address spaces are cast into generic before invoking the constructor.

Added support for a trailing Qualifiers object in FunctionProtoType.

Differential Revision: https://reviews.llvm.org/D54862


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@348927 91177308-0d34-0410-b5e6-96231b3b80d8
40 files changed