Add . to includePaths() for qt4project

QMake implicitly adds it, so we need to do the same.

Change-Id: Ifa1733e79f8eaa8461906fe23f492fc6e83ad017
Done-by: dt
Reviewed-by: Leandro Melo <leandro.melo@nokia.com>

src/plugins/qt4projectmanager/qt4nodes.cpp

@@ -2013,6 +2013,8 @@ QStringList Qt4ProFileNode::includePaths(QtSupport::ProFileReader *reader) const
     // except if those directories don't exist at the time of parsing
     // thus we add those directories manually (without checking for existence)
     paths << mocDirPath(reader) << uiDirPath(reader);
+    // qmake always adds "."
+    paths << m_projectDir;
     paths.removeDuplicates();
     return paths;
 }