config: fix ruby path for ruby 1.8
config: fix ruby path for ruby 1.8

staticfloat/brew,mahori/brew,jmsundar/brew,bfontaine/brew,amar-laksh/brew_sudo,palxex/brew,mahori/brew,JCount/brew,gregory-nisbet/brew,Linuxbrew/brew,maxim-belkin/brew,vitorgalvao/brew,vitorgalvao/brew,gordonmcshane/homebrew,sjackman/homebrew,maxim-belkin/brew,Linuxbrew/brew,mgrimes/brew,toonetown/homebrew,mgrimes/brew,Homebrew/brew,hanxue/linuxbrew,hanxue/linuxbrew,AnastasiaSulyagina/brew,rwhogg/brew,DomT4/brew,zmwangx/brew,Homebrew/brew,mahori/brew,amar-laksh/brew_sudo,alyssais/brew,konqui/brew,gordonmcshane/homebrew,alyssais/brew,EricFromCanada/brew,AnastasiaSulyagina/brew,tonyg/homebrew,ilovezfs/brew,muellermartin/dist,mistydemeo/homebrew,nandub/brew,pseudocody/brew,pseudocody/brew,JCount/brew,mgrimes/brew,reelsense/brew,konqui/brew,mistydemeo/homebrew,MikeMcQuaid/brew,reelsense/brew,DomT4/brew,reitermarkus/brew,aw1621107/brew,hanxue/linuxbrew,aw1621107/brew,jmsundar/brew,gregory-nisbet/brew,zmwangx/brew,mistydemeo/homebrew,aw1621107/brew,tonyg/homebrew,EricFromCanada/brew,toonetown/homebrew,gregory-nisbet/brew,toonetown/homebrew,zmwangx/brew,rwhogg/brew,AnastasiaSulyagina/brew,jmsundar/brew,vitorgalvao/brew,reitermarkus/brew,Linuxbrew/brew,sjackman/homebrew,muellermartin/dist,palxex/brew,MikeMcQuaid/brew,EricFromCanada/brew,amar-laksh/brew_sudo,JCount/brew,claui/brew,konqui/brew,EricFromCanada/brew,DomT4/brew,vitorgalvao/brew,Homebrew/brew,rwhogg/brew,ilovezfs/brew,ilovezfs/brew,mahori/brew,Homebrew/brew,Linuxbrew/brew,nandub/brew,JCount/brew,muellermartin/dist,pseudocody/brew,claui/brew,reelsense/brew,nandub/brew,claui/brew,sjackman/homebrew,DomT4/brew,bfontaine/brew,reitermarkus/brew,bfontaine/brew,sjackman/homebrew,staticfloat/brew,maxim-belkin/brew,konqui/brew,MikeMcQuaid/brew,nandub/brew,alyssais/brew,staticfloat/brew,gordonmcshane/homebrew,reitermarkus/brew,tonyg/homebrew,claui/brew,palxex/brew,MikeMcQuaid/brew