brew_bash_completion: complete --force for brew link
brew_bash_completion: complete --force for brew link

Closes Homebrew/homebrew#19828.

Signed-off-by: Adam Vandenberg <34c2b6407fd5a10249a15d699d40f9ed1782e98c@gmail.com>

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