[WIP] mac/keg_relocate: Emulate dylinker behavior
[WIP] mac/keg_relocate: Emulate dylinker behavior

Instead of assuming that #{lib} is the correct RPATH expansion,
test all RPATHS and substitute the first one that works.

sjackman/homebrew,EricFromCanada/brew,MikeMcQuaid/brew,EricFromCanada/brew,MikeMcQuaid/brew,vitorgalvao/brew,reitermarkus/brew,reitermarkus/brew,sjackman/homebrew,mahori/brew,nandub/brew,mahori/brew,reitermarkus/brew,EricFromCanada/brew,nandub/brew,Homebrew/brew,MikeMcQuaid/brew,vitorgalvao/brew,JCount/brew,Homebrew/brew,JCount/brew,mahori/brew,sjackman/homebrew,MikeMcQuaid/brew,konqui/brew,JCount/brew,konqui/brew,sjackman/homebrew,mahori/brew,nandub/brew,claui/brew,nandub/brew,Homebrew/brew,vitorgalvao/brew,konqui/brew,Homebrew/brew,claui/brew,claui/brew,JCount/brew,claui/brew,konqui/brew,reitermarkus/brew,vitorgalvao/brew,EricFromCanada/brew