[analyzer] Do not walk the types for call graph construction.

Similar to r156661. This should be beneficial performance wise and
hopefully, resolve a RecursiveASTVisitor crash that we are seeing in the
wild, but are incapable of reproducing.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@158851 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/Analysis/CallGraph.h b/include/clang/Analysis/CallGraph.h
index 03510b7..81afec0 100644
--- a/include/clang/Analysis/CallGraph.h
+++ b/include/clang/Analysis/CallGraph.h
@@ -121,6 +121,8 @@
     return true;
   }
 
+  bool shouldWalkTypesOfTypeLocs() const { return false; }
+
 private:
   /// \brief Add the given declaration to the call graph.
   void addNodeForDecl(Decl *D, bool IsGlobal);