build: dist initrd meson.build files

Fixes: b544f724
4 jobs for bg/issue77 in 11 minutes and 40 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Test
passed #40827
checkpatch

00:01:32

passed #40828
f28_build_default

00:11:05

passed #40829
f28_rpm_autotools_dbg

00:11:07

passed #40830
f28_rpm_meson_dbg

00:10:07