Add an accessor to ValueObject that determines if the object represents a base class, and also returns the depth of base-class-ness. For instance if one has class C : public B {} class B : public A {}, the value for A nested in B nested in C would be a base class of depth 2

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@216032 91177308-0d34-0410-b5e6-96231b3b80d8