Fix outdated comment. Checks so much more than just typedefs in C++.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@60676 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/Parse/Action.h b/include/clang/Parse/Action.h
index b25466d..4d6d4c5 100644
--- a/include/clang/Parse/Action.h
+++ b/include/clang/Parse/Action.h
@@ -106,7 +106,7 @@
   // Declaration Tracking Callbacks.
   //===--------------------------------------------------------------------===//
   
-  /// isTypeName - Return non-null if the specified identifier is a typedef name
+  /// isTypeName - Return non-null if the specified identifier is a type name
   /// in the current scope.
   /// An optional CXXScopeSpec can be passed to indicate the C++ scope (class or
   /// namespace) that the identifier must be a member of.