fio: update license (#72688)
fio: update license (#72688)

From fio.c:

    * The license below covers all files distributed with fio unless otherwise
    * noted in the file itself.
    *
    *  This program is free software; you can redistribute it and/or modify
    *  it under the terms of the GNU General Public License version 2 as
    *  published by the Free Software Foundation.

Some headers specify "or later", but these usually do not come with the
qualification that the license "covers all files distributed with fio".
Homebrew/homebrew-core,lemzwerg/homebrew-core,nandub/homebrew-core,Moisan/homebrew-core,sjackman/homebrew-core,makigumo/homebrew-core,zyedidia/homebrew-core,adam-moss/homebrew-core,Linuxbrew/homebrew-core,cblecker/homebrew-core,JCount/homebrew-core,mbcoguno/homebrew-core,sjackman/homebrew-core,zyedidia/homebrew-core,uyjulian/homebrew-core,cblecker/homebrew-core,Linuxbrew/homebrew-core,Homebrew/homebrew-core,makigumo/homebrew-core,stgraber/homebrew-core,JCount/homebrew-core,mbcoguno/homebrew-core,uyjulian/homebrew-core,Moisan/homebrew-core,mfikes/homebrew-core,mbcoguno/homebrew-core,stgraber/homebrew-core,adam-moss/homebrew-core,chrisfinazzo/homebrew-core,nbari/homebrew-core,nbari/homebrew-core,filcab/homebrew-core,lemzwerg/homebrew-core,nandub/homebrew-core,mfikes/homebrew-core,chrisfinazzo/homebrew-core,filcab/homebrew-core