chroot: fix setgroups prototype on linux
chroot: fix setgroups prototype on linux

polapl/coreutils,filmor/coreutils,keunwoo/coreutils,Heather/coreutils,dokaptur/coreutils,mauricio/coreutils,keunwoo/coreutils,retep998/coreutils,kevgeniy/coreutils,bundai223/coreutils,Shir0kamii/coreutils,steveklabnik/coreutils,Arcterus/coreutils,hexsel/coreutils,Shir0kamii/coreutils,Gianbaoluo/coreutils,uutils/coreutils,kball/coreutils,polapl/coreutils,sshling/coreutils,mauricio/coreutils,efuquen/coreutils,wimh/coreutils,filmor/coreutils,Heather/coreutils,bundai223/coreutils,ebfe/coreutils,kwantam/coreutils,retep998/coreutils,hexsel/coreutils,wimh/coreutils,tempbottle/coreutils,jbcrail/coreutils,steveklabnik/coreutils,Gianbaoluo/coreutils,dbrgn/coreutils,samfoo/coreutils,sshling/coreutils,tempbottle/coreutils,Shtong/coreutils,kwantam/coreutils,silvio/rust-coreutils,efuquen/coreutils,samfoo/coreutils,beni55/coreutils,silvio/rust-coreutils,beni55/coreutils,kball/coreutils,Arcterus/coreutils,dbrgn/coreutils,dbrgn/coreutils,uutils/coreutils,uutils/coreutils,ebfe/coreutils,dennis/coreutils,jbcrail/coreutils,kevgeniy/coreutils,dennis/coreutils,Shtong/coreutils