GenericProject: Cleanup and modernize

* Use nullptr instead 0
* Remove QLatin1{String|Char} where possible
* Use C++11 list init and auto
* Add some const as drive-by-change

Change-Id: Ife4c9c7b0869bcf2c864b88b8061ac6b7c3f33c0
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/genericprojectmanager/genericproject.h

@@ -85,7 +85,7 @@ private:
     bool saveRawList(const QStringList &rawList, const QString &fileName);
     void parseProject(RefreshOptions options);
     QStringList processEntries(const QStringList &paths,
-                               QHash<QString, QString> *map = 0) const;
+                               QHash<QString, QString> *map = nullptr) const;
 
     void refreshCppCodeModel();