composer install 报magento/product-enterprise-edition 2.0.2 requires ext-gd * -> the requested PHP ex
在linux中报类似的错误Problem1-Installationrequestformagento/product-enterprise-edition2.0.2->satisfiablebymagento/product-enterprise-edition[2.0.2].-magento/product-enterprise-edition2.0.2requiresext-gd*->the