Added ASTContext methods getIntPtrType and getUIntPtrType.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173581 91177308-0d34-0410-b5e6-96231b3b80d8
Migrate tests to -verify


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173582 91177308-0d34-0410-b5e6-96231b3b80d8