[extension] no gc profiler for ruby < 1.9.3
[extension] no gc profiler for ruby < 1.9.3

yonglehou/sensu,keymone/sensu,bf4/sensu,portertech/sensu,upfluence/sensu,pauloconnor/sensu,quodlibetor/sensu,npe9/sensu,m4ce/sensu,zuazo-forks/sensu,withnale/sensu,roobert/sensu,javrasya/sensu,crewton/sensu,rbramwell/sensu,sensu/sensu,solarkennedy/sensu,miyakawataku/sensu,cread/sensu,somic/sensu