Clone the full Type hierarchy into the TypeLoc hierarchy. Normalize

Clone the full Type hierarchy into the TypeLoc hierarchy.  Normalize
TypeLoc class names to be $(Type classname)Loc.  Rewrite the visitor.
Provide skeleton implementations for all the new TypeLocs.

Handle all cases in PCH.  Handle a few more cases when inserting
location information in SemaType.

It should be extremely straightforward to add new location information
to existing TypeLoc objects now.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@84386 91177308-0d34-0410-b5e6-96231b3b80d8