Add Xcode 4.5 to StandardCompilers map
Add Xcode 4.5 to StandardCompilers map

We now have several reports of compiler versions for the GM,
e.g. Homebrew/homebrew#14944.

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