Update README.md from Homebrew docs/Linuxbrew.md (#912)
Update README.md from Homebrew docs/Linuxbrew.md (#912)

See https://github.com/Homebrew/brew/blob/master/docs/Linuxbrew.md
Linuxbrew/brew,Linuxbrew/brew,Linuxbrew/brew,Linuxbrew/brew