Clang: Simplify name and type in FullTokenInfo for functions

Take Cursor displayName instead of token name.
From now on type spelling can serve the return type
role for functions because together with 'token' member
they form the full type.

Change-Id: Ic8eec533f4a11458f99f070b6a6aa80714097b4d
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>

src/libs/clangsupport/tokeninfocontainer.cpp

@@ -77,7 +77,6 @@ QDebug operator<<(QDebug debug, const ExtraInfo &extraInfo)
     debug.nospace() << "ExtraInfo("
                     << extraInfo.token << ", "
                     << extraInfo.typeSpelling << ", "
-                    << extraInfo.resultTypeSpelling << ", "
                     << extraInfo.semanticParentTypeSpelling << ", "
                     << extraInfo.cursorRange << ", "
                     << extraInfo.lexicalParentIndex << ", "