os/linux: add more Xcode stubs.
os/linux: add more Xcode stubs.

Saw these on a random user report.

sjackman/homebrew,nandub/brew,claui/brew,claui/brew,konqui/brew,sjackman/homebrew,konqui/brew,reitermarkus/brew,reitermarkus/brew,Homebrew/brew,vitorgalvao/brew,Homebrew/brew,claui/brew,MikeMcQuaid/brew,EricFromCanada/brew,reitermarkus/brew,EricFromCanada/brew,sjackman/homebrew,konqui/brew,sjackman/homebrew,nandub/brew,claui/brew,JCount/brew,mahori/brew,reitermarkus/brew,Homebrew/brew,mahori/brew,JCount/brew,EricFromCanada/brew,mahori/brew,nandub/brew,vitorgalvao/brew,Homebrew/brew,MikeMcQuaid/brew,vitorgalvao/brew,mahori/brew,konqui/brew,MikeMcQuaid/brew,EricFromCanada/brew,JCount/brew,MikeMcQuaid/brew,vitorgalvao/brew,nandub/brew,JCount/brew