Make check for stray developer dir more specific
Make check for stray developer dir more specific

It looks like there can be harmless stuff leftover in
/Developer/Library, even after Xcode uninstalls older versions. The
existence of the uninstall-developer-folder script should be a better
indicator.

Fixes Homebrew/homebrew#14970.
vitorgalvao/brew,reitermarkus/brew,claui/brew,amar-laksh/brew_sudo,MikeMcQuaid/brew,konqui/brew,nandub/brew,sjackman/homebrew,rwhogg/brew,mahori/brew,konqui/brew,DomT4/brew,muellermartin/dist,muellermartin/dist,DomT4/brew,jmsundar/brew,ilovezfs/brew,JCount/brew,jmsundar/brew,vitorgalvao/brew,konqui/brew,reitermarkus/brew,maxim-belkin/brew,nandub/brew,Linuxbrew/brew,reitermarkus/brew,EricFromCanada/brew,maxim-belkin/brew,pseudocody/brew,palxex/brew,sjackman/homebrew,hanxue/linuxbrew,toonetown/homebrew,mgrimes/brew,gregory-nisbet/brew,rwhogg/brew,pseudocody/brew,jmsundar/brew,mahori/brew,reitermarkus/brew,sjackman/homebrew,aw1621107/brew,aw1621107/brew,gregory-nisbet/brew,reelsense/brew,bfontaine/brew,bfontaine/brew,EricFromCanada/brew,bfontaine/brew,Linuxbrew/brew,JCount/brew,MikeMcQuaid/brew,DomT4/brew,ilovezfs/brew,mahori/brew,mgrimes/brew,nandub/brew,Homebrew/brew,EricFromCanada/brew,gordonmcshane/homebrew,rwhogg/brew,muellermartin/dist,reelsense/brew,sjackman/homebrew,Homebrew/brew,pseudocody/brew,tonyg/homebrew,Linuxbrew/brew,AnastasiaSulyagina/brew,nandub/brew,EricFromCanada/brew,reelsense/brew,ilovezfs/brew,konqui/brew,alyssais/brew,amar-laksh/brew_sudo,zmwangx/brew,MikeMcQuaid/brew,hanxue/linuxbrew,AnastasiaSulyagina/brew,gregory-nisbet/brew,tonyg/homebrew,Linuxbrew/brew,gordonmcshane/homebrew,hanxue/linuxbrew,mistydemeo/homebrew,tonyg/homebrew,palxex/brew,alyssais/brew,toonetown/homebrew,mistydemeo/homebrew,alyssais/brew,palxex/brew,maxim-belkin/brew,MikeMcQuaid/brew,vitorgalvao/brew,zmwangx/brew,claui/brew,staticfloat/brew,Homebrew/brew,toonetown/homebrew,Homebrew/brew,AnastasiaSulyagina/brew,gordonmcshane/homebrew,zmwangx/brew,DomT4/brew,JCount/brew,amar-laksh/brew_sudo,claui/brew,JCount/brew,mistydemeo/homebrew,mahori/brew,claui/brew,staticfloat/brew,mgrimes/brew,staticfloat/brew,vitorgalvao/brew,aw1621107/brew