uucore: add support for optflagopt to coreopts
uucore: add support for optflagopt to coreopts

ebfe/coreutils,Heather/coreutils,wimh/coreutils,jbcrail/coreutils,wimh/coreutils,uutils/coreutils,tempbottle/coreutils,kevgeniy/coreutils,keunwoo/coreutils,kevgeniy/coreutils,Heather/coreutils,ebfe/coreutils,Arcterus/coreutils,jbcrail/coreutils,tempbottle/coreutils,uutils/coreutils,keunwoo/coreutils,Arcterus/coreutils,uutils/coreutils