cc: don't filter -fopenmp for non-llvm_clang.
cc: don't filter -fopenmp for non-llvm_clang.

We can filter it just for Clang and let it be used by anything else.

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