[Fix] ensure `uname` is unaliased.
[Fix] ensure `uname` is unaliased.

Closes #1105
PeterDaveHelloKitchen/nvm,creationix/nvm,PeterDaveHello/nvm,lukechilds/nvm,ljharb/nvm,PeterDaveHello/nvm,evocateur/nvm,PeterDaveHelloKitchen/nvm,creationix/nvm,ljharb/nvm,edwmurph/nvm,evocateur/nvm,edwmurph/nvm,lukechilds/nvm