[Tests] set x option in update mock to better locate failures
[Tests] set x option in update mock to better locate failures

lukechilds/nvm,edwmurph/nvm,edwmurph/nvm,PeterDaveHello/nvm,ljharb/nvm,PeterDaveHelloKitchen/nvm,PeterDaveHello/nvm,evocateur/nvm,evocateur/nvm,creationix/nvm,PeterDaveHelloKitchen/nvm,creationix/nvm,lukechilds/nvm,ljharb/nvm