mac/version: add symbol for macOS Mojave
mac/version: add symbol for macOS Mojave

MikeMcQuaid/brew,Homebrew/brew,Linuxbrew/brew,claui/brew,JCount/brew,ilovezfs/brew,vitorgalvao/brew,sjackman/homebrew,mahori/brew,claui/brew,DomT4/brew,Homebrew/brew,mahori/brew,vitorgalvao/brew,nandub/brew,DomT4/brew,DomT4/brew,MikeMcQuaid/brew,Homebrew/brew,EricFromCanada/brew,reitermarkus/brew,sjackman/homebrew,mahori/brew,reitermarkus/brew,nandub/brew,konqui/brew,mahori/brew,JCount/brew,Homebrew/brew,nandub/brew,vitorgalvao/brew,JCount/brew,maxim-belkin/brew,sjackman/homebrew,vitorgalvao/brew,claui/brew,konqui/brew,maxim-belkin/brew,mgrimes/brew,reitermarkus/brew,Linuxbrew/brew,konqui/brew,nandub/brew,ilovezfs/brew,konqui/brew,JCount/brew,mgrimes/brew,Linuxbrew/brew,EricFromCanada/brew,DomT4/brew,reitermarkus/brew,MikeMcQuaid/brew,maxim-belkin/brew,sjackman/homebrew,EricFromCanada/brew,Linuxbrew/brew,claui/brew,MikeMcQuaid/brew,ilovezfs/brew,mgrimes/brew,EricFromCanada/brew