Have MSVC Visualizer for DeducedTemplateSpecializationType show both the original...

Have MSVC Visualizer for DeducedTemplateSpecializationType show both the original template and deduced specialization

Now appears in the Autos window something like

- MyType	DeducedTemplateSpecializationType  {struct Y<int>}
|- Template	template<typename T> struct Y;
|- Deduced As	struct Y<int>
|- isDeduced	true	bool
|- TypeClass	DeducedTemplateSpecialization (36)
|- Flags	No TypeBits set beyond TypeClass
|- Canonical	RecordType  {struct Y<int>}

Also changed QualType visualization to auto-expand the BaseType

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@350487 91177308-0d34-0410-b5e6-96231b3b80d8