C++11: Fix parsing of trailing-type-specifier.

In particular "auto foo() -> typename Foo<T>::X;" didn't parse.

Change-Id: I7665c9b387e222e4107f053a529d502813ebf617
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

tests/auto/cplusplus/cxx11/data/trailingtypespec.1.cpp

@@ -0,0 +1,5 @@
+auto foo()
+    -> const typename XYZ::abc<T>::def;
+
+auto foo()
+    -> class XYZ::def;