gnulib-tool.py: Don't discard the 'dummy' module. * pygnulib/GLImport.py (GLImport.prepare): Don't set modules stored in the GLModuleTable until after the 'dummy' module is added. * pygnulib/GLModuleSystem.py (GLImport.setBaseModules) (GLImport.setFinalModules, GLImport.setMainModules) (GLImport.setTestsModules): Don't sort modules since the 'dummy' module should be placed last in the Makefiles.