ENV: Fix warn_about_non_apple_gcc for Linuxbrew
ENV: Fix warn_about_non_apple_gcc for Linuxbrew

rwhogg/brew,hanxue/linuxbrew,Linuxbrew/brew,maxim-belkin/brew,maxim-belkin/brew,rwhogg/brew,hanxue/linuxbrew,Linuxbrew/brew,Linuxbrew/brew,rwhogg/brew,hanxue/linuxbrew,maxim-belkin/brew,Linuxbrew/brew