add test/extension to Makefile, equivalent to phpunit --group extension
add test/extension to Makefile, equivalent to phpunit --group extension

davidfuhr/phpbrew,mengzyou/phpbrew,pierredup/phpbrew,viniciusferreira/phpbrew,viniciusferreira/phpbrew,pinkbigmacmedia/phpbrew,dduca-sugarcrm/phpbrew,konomae/phpbrew,morozov/phpbrew,davidfuhr/phpbrew,kayyyy/phpbrew,zonuexe/phpbrew,svetlyak40wt/phpbrew,svetlyak40wt/phpbrew,williamn/phpbrew,kayyyy/phpbrew,davidfuhr/phpbrew,pinkbigmacmedia/phpbrew,williamn/phpbrew,wellic/phpbrew,viniciusferreira/phpbrew,dduca-sugarcrm/phpbrew,mengzyou/phpbrew,zonuexe/phpbrew,davidfuhr/phpbrew,dduca-sugarcrm/phpbrew,davidfuhr/phpbrew,konomae/phpbrew,pierredup/phpbrew,phpbrew/phpbrew,svetlyak40wt/phpbrew,pinkbigmacmedia/phpbrew,konomae/phpbrew,williamn/phpbrew,dduca-sugarcrm/phpbrew,hechunwen/phpbrew,hechunwen/phpbrew,phpbrew/phpbrew,phpbrew/phpbrew,wellic/phpbrew,zonuexe/phpbrew,kayyyy/phpbrew,pierredup/phpbrew,konomae/phpbrew,williamn/phpbrew,mengzyou/phpbrew,viniciusferreira/phpbrew,kayyyy/phpbrew,hechunwen/phpbrew,pierredup/phpbrew,morozov/phpbrew,hechunwen/phpbrew,wellic/phpbrew,svetlyak40wt/phpbrew,zonuexe/phpbrew,mengzyou/phpbrew,pinkbigmacmedia/phpbrew,wellic/phpbrew