sysutils/coreutils: update to 8.30

Also reorder some variables.

Announcement:

http://lists.gnu.org/archive/html/coreutils-announce/2018-07/msg00000.html

PR: 231573
Submitted by: pkubaj@anongoth.pl
Approved by: tcberner (mentor, implicit), jharris@widomaker.com (maintainer)