ProjectPart: Add meta information

Add displayname and project file path and a pointer back to the
project.

Change-Id: Ic9a18f52a6291493bd3a95fd3456ed0e1a3c63e3
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

src/plugins/cpptools/cppmodelmanagerinterface.h

@@ -102,6 +102,9 @@ public:
     typedef QSharedPointer<ProjectPart> Ptr;
 
 public:
+    QString displayName;
+    QString projectFile;
+    ProjectExplorer::Project *project;
     QList<ProjectFile> files;
     QByteArray defines;
     QStringList includePaths;