Skip zip copy test for hhvm
Skip zip copy test for hhvm

mhlavac/flysystem,oswaldderiemaecker/flysystem,hannesvdvreken/flysystem,farmisen/flysystem,sachintaware/flysystem,sohelrana820/flysystem,mhlavac/flysystem,CarsonF/flysystem,twistor/flysystem,Amrit01/flysystem,nao-pon/flysystem,twistor/flysystem,rossriley/flysystem,mapyo/flysystem,barryvdh/flysystem,dshafik/flysystem,dstockto/flysystem