fix return value to test when calling Utils::system method
fix return value to test when calling Utils::system method

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