C++: Fix code compl. for instantiation of template specialization

It works for full specialization. Instantiate of the partial
specialization has to be implemented(finding appropriate partial
specialization-on going)

Added unit test.

Change-Id: I8ef5ea963e7c665e0d67d390b3a833486773dab0
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

src/libs/3rdparty/cplusplus/Control.h

@@ -51,6 +51,7 @@ public:
 
     /// Returns the canonical template name id.
     const TemplateNameId *templateNameId(const Identifier *id,
+                                         bool isSpecialization,
                                          const FullySpecifiedType *const args = 0,
                                          unsigned argc = 0);