splint: add license (#74676)
splint: add license (#74676)

Debian classify this as GPL-2.0+. See

    https://sources.debian.org/src/splint/1:3.1.2+dfsg-5/debian/copyright/
makigumo/homebrew-core,mbcoguno/homebrew-core,mbcoguno/homebrew-core,sjackman/homebrew-core,nbari/homebrew-core,cblecker/homebrew-core,Moisan/homebrew-core,lemzwerg/homebrew-core,nandub/homebrew-core,uyjulian/homebrew-core,mfikes/homebrew-core,JCount/homebrew-core,adam-moss/homebrew-core,lemzwerg/homebrew-core,nandub/homebrew-core,Homebrew/homebrew-core,Linuxbrew/homebrew-core,sjackman/homebrew-core,makigumo/homebrew-core,Linuxbrew/homebrew-core,Homebrew/homebrew-core,adam-moss/homebrew-core,uyjulian/homebrew-core,mfikes/homebrew-core,stgraber/homebrew-core,Moisan/homebrew-core,mbcoguno/homebrew-core,chrisfinazzo/homebrew-core,zyedidia/homebrew-core,zyedidia/homebrew-core,chrisfinazzo/homebrew-core,nbari/homebrew-core,filcab/homebrew-core,stgraber/homebrew-core,filcab/homebrew-core,JCount/homebrew-core,cblecker/homebrew-core