Clang: Add lexical parent index to token information

This makes easier to build a tree out of tokens data.

Change-Id: Ia2a79f085797869ea2f3799b26dd44b4e051b625
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>

src/libs/clangsupport/tokeninfocontainer.cpp

@@ -80,6 +80,7 @@ QDebug operator<<(QDebug debug, const ExtraInfo &extraInfo)
                     << extraInfo.resultTypeSpelling << ", "
                     << extraInfo.semanticParentTypeSpelling << ", "
                     << extraInfo.cursorRange << ", "
+                    << extraInfo.lexicalParentIndex << ", "
                     << static_cast<uint>(extraInfo.accessSpecifier) << ", "
                     << static_cast<uint>(extraInfo.storageClass) << ", "
                     << extraInfo.identifier << ", "