Make sure to set child's argv size so we can correctly free argv
Make sure to set child's argv size so we can correctly free argv

Change-Id: I0b4a5d39d3b8d0164bbce7e83969e0026e7f92a9

cloudfoundry-incubator/garden,tsaleh/garden,savaki/garden,shashidharatd/garden-linux,tsaleh/garden,shashidharatd/garden-linux,cloudfoundry-incubator/garden-linux,savaki/garden,shashidharatd/garden-linux,tangfeixiong/garden,tangfeixiong/garden,cloudfoundry-incubator/garden-linux,shashidharatd/garden-linux,cloudfoundry-incubator/garden-linux,cloudfoundry-incubator/garden