Manually run git gc after nvm installation, fix #1226
Manually run git gc after nvm installation, fix #1226

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