shims/scm/git: Fix the search for brewed git
shims/scm/git: Fix the search for brewed git

Search for brewed git in both locations:
$HOMEBREW_PREFIX/Homebrew/Library/Homebrew/shims/scm/../../../../../bin/git
$HOMEBREW_PREFIX/Library/Homebrew/shims/scm/../../../../bin/git

DomT4/brew,claui/brew,MikeMcQuaid/brew,mgrimes/brew,DomT4/brew,claui/brew,alyssais/brew,reitermarkus/brew,EricFromCanada/brew,mahori/brew,JCount/brew,Linuxbrew/brew,vitorgalvao/brew,alyssais/brew,reelsense/brew,Linuxbrew/brew,mahori/brew,ilovezfs/brew,reitermarkus/brew,maxim-belkin/brew,nandub/brew,EricFromCanada/brew,mahori/brew,mgrimes/brew,sjackman/homebrew,mgrimes/brew,reitermarkus/brew,konqui/brew,sjackman/homebrew,MikeMcQuaid/brew,JCount/brew,Homebrew/brew,pseudocody/brew,hanxue/linuxbrew,maxim-belkin/brew,vitorgalvao/brew,reelsense/brew,EricFromCanada/brew,MikeMcQuaid/brew,DomT4/brew,nandub/brew,Homebrew/brew,vitorgalvao/brew,DomT4/brew,vitorgalvao/brew,JCount/brew,EricFromCanada/brew,ilovezfs/brew,Homebrew/brew,reitermarkus/brew,hanxue/linuxbrew,JCount/brew,konqui/brew,Homebrew/brew,pseudocody/brew,claui/brew,Linuxbrew/brew,Linuxbrew/brew,hanxue/linuxbrew,nandub/brew,konqui/brew,nandub/brew,MikeMcQuaid/brew,claui/brew,pseudocody/brew,sjackman/homebrew,reelsense/brew,ilovezfs/brew,konqui/brew,sjackman/homebrew,alyssais/brew,mahori/brew,maxim-belkin/brew