system_command_result_spec: fix frozen objects.
system_command_result_spec: fix frozen objects.

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