compilers: support GCC 10 as a formula
compilers: support GCC 10 as a formula

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