don't run c-extension tests on jruby
don't run c-extension tests on jruby

chef/ffi-yajl,h4ck3rm1k3/ffi-yajl,chef/ffi-yajl,kou/ffi-yajl,kou/ffi-yajl,h4ck3rm1k3/ffi-yajl,chef/ffi-yajl,h4ck3rm1k3/ffi-yajl,kou/ffi-yajl