Add managed boxes feature to fix the build on latest master
Add managed boxes feature to fix the build on latest master

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