ProjectPart: Allow for line/column information in project file

Keep this information separate so that plugins using the information
do not need to start parsing the project file.

Change-Id: Ibecf431de1b12bbe820c6f8f9c986cffeb4972d2
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>
Reviewed-by: Christian Stenger <christian.stenger@qt.io>
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>

src/plugins/cpptools/projectpart.h

@@ -105,6 +105,8 @@ public:
     QString displayName;
 
     QString projectFile;
+    int projectFileLine = -1;
+    int projectFileColumn = -1;
     QString projectConfigFile; // currently only used by the Generic Project Manager
 
     ProjectFiles files;