Link to pcc and tiger branches.
Link to pcc and tiger branches.

sceaga maintains Tiger and PPC support for Homebrew, so change our error
messages to refer to his branches.

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