ARGV: use include? for --HEAD
ARGV: use include? for --HEAD

ARGV.build_head? will return true if the typo '-HEAD' is passed because
it uses flag? to detect the option. However, we only filter the exact
spelling of '--HEAD' in ARGV.filter_for_dependencies, and thus the HEAD
property is undesirably passed to deps during installation.

Since we never advertised '-H' as a valid short option for '--HEAD',
just use include? instead of flag?.

Signed-off-by: Jack Nagel <43386ce32af96f5c56f2a88e458cb94cebee3751@gmail.com>

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