doctor: don't report wrong location of autoconf if it's missing
doctor: don't report wrong location of autoconf if it's missing

Signed-off-by: Adam Vandenberg <34c2b6407fd5a10249a15d699d40f9ed1782e98c@gmail.com>

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