Support c99/c89 compiles properly
Support c99/c89 compiles properly

We can't really execute c89/99 explicitly as these POSIX compliant tools support very few args. Best to execute clang or gcc with the --std=cx9 argument appended.

Fixes Homebrew/homebrew#14724.
mahori/brew,Linuxbrew/brew,mahori/brew,JCount/brew,gordonmcshane/homebrew,zmwangx/brew,reitermarkus/brew,tonyg/homebrew,AnastasiaSulyagina/brew,DomT4/brew,DomT4/brew,alyssais/brew,mahori/brew,Linuxbrew/brew,vitorgalvao/brew,Homebrew/brew,hanxue/linuxbrew,EricFromCanada/brew,toonetown/homebrew,muellermartin/dist,claui/brew,konqui/brew,mistydemeo/homebrew,gordonmcshane/homebrew,staticfloat/brew,ilovezfs/brew,pseudocody/brew,nandub/brew,rwhogg/brew,reitermarkus/brew,jmsundar/brew,sjackman/homebrew,palxex/brew,Homebrew/brew,amar-laksh/brew_sudo,bfontaine/brew,jmsundar/brew,mahori/brew,reelsense/brew,maxim-belkin/brew,DomT4/brew,nandub/brew,mistydemeo/homebrew,claui/brew,rwhogg/brew,DomT4/brew,sjackman/homebrew,mgrimes/brew,claui/brew,MikeMcQuaid/brew,konqui/brew,MikeMcQuaid/brew,EricFromCanada/brew,reitermarkus/brew,bfontaine/brew,JCount/brew,mgrimes/brew,rwhogg/brew,staticfloat/brew,Linuxbrew/brew,mistydemeo/homebrew,vitorgalvao/brew,sjackman/homebrew,palxex/brew,Linuxbrew/brew,muellermartin/dist,AnastasiaSulyagina/brew,pseudocody/brew,nandub/brew,alyssais/brew,vitorgalvao/brew,staticfloat/brew,JCount/brew,zmwangx/brew,ilovezfs/brew,palxex/brew,reitermarkus/brew,aw1621107/brew,gordonmcshane/homebrew,jmsundar/brew,reelsense/brew,konqui/brew,aw1621107/brew,toonetown/homebrew,MikeMcQuaid/brew,ilovezfs/brew,hanxue/linuxbrew,maxim-belkin/brew,EricFromCanada/brew,tonyg/homebrew,bfontaine/brew,gregory-nisbet/brew,EricFromCanada/brew,zmwangx/brew,JCount/brew,muellermartin/dist,gregory-nisbet/brew,gregory-nisbet/brew,amar-laksh/brew_sudo,vitorgalvao/brew,nandub/brew,AnastasiaSulyagina/brew,Homebrew/brew,hanxue/linuxbrew,toonetown/homebrew,alyssais/brew,sjackman/homebrew,tonyg/homebrew,claui/brew,pseudocody/brew,MikeMcQuaid/brew,Homebrew/brew,aw1621107/brew,konqui/brew,mgrimes/brew,amar-laksh/brew_sudo,reelsense/brew,maxim-belkin/brew