Remove qSort usages from QtDBus

QtAlgorithms is getting deprecated,
see http://www.mail-archive.com/development@qt-project.org/msg01603.html

Change-Id: Ibd471d5dd7cda878d0fb71202468a7ccfa5d5046
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/dbus/qdbusabstractadaptor.cpp

@@ -274,7 +274,7 @@ void QDBusAdaptorConnector::polish()
     }
 
     // sort the adaptor list
-    qSort(adaptors);
+    std::sort(adaptors.begin(), adaptors.end());
 }
 
 void QDBusAdaptorConnector::relaySlot(void **argv)