Refactoring for (Q)MakeBuildStepFactory

Rename (Q)MakeBuildStepFactory to (Q)MakeStepFacotry
Move the factories to the same files as (Q)MakeStep
Delete the old qmakebuildstepfactory.(h|cpp)

src/plugins/qt4projectmanager/qt4projectmanagerplugin.h

@@ -42,8 +42,8 @@ namespace Internal {
 class ProFileEditorFactory;
 class ConsoleAppWizard;
 class GuiAppWizard;
-class QMakeBuildStepFactory;
-class MakeBuildStepFactory;
+class QMakeStepFactory;
+class MakeStepFactory;
 class GccParserFactory;
 class MsvcParserFactory;
 class QtVersionManager;