Revert "cc: disable RUBYOPT variable."
Revert "cc: disable RUBYOPT variable."

This reverts commit 03268031f1b371fc573c736a03f87f3a15284a0c.

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