mkarchiso: also add iso name in grub environment block

3 jobs for master in 37 minutes and 56 seconds (queued for 1 second)
Status Job ID Name Coverage
  Lint
passed #19973
shellcheck

00:00:21

 
  Build
passed #19974
secure
build:secure: [baseline]

00:16:05

passed #19975
secure
build:secure: [releng]

00:37:34