[Buildroot] [git commit] group file: define groups expected by udev

[Thomas Petazzoni]

commit: http://git.buildroot.net/buildroot/commit/?id=3e56504d9f5eec801154664f985b4c189340e99d
branch: http://git.buildroot.net/buildroot/commit/?id=refs/heads/master

udev-182 requires several groups to be resolvable at udev startup,
including disk, cdrom, floppy, tape, audio, video, lp, tty, dialout,
and kmem.  Only some of these are in the default skeleton's group
file, So let's add the missing groups, and plugdev too.

This avoids getting these logs in /var/logs/messages:

Jan  1 00:00:08 buildroot daemon.err udevd[37]: specified group 'dialout' unknown
Jan  1 00:00:08 buildroot daemon.err udevd[37]: specified group 'kmem' unknown
Jan  1 00:00:08 buildroot daemon.err udevd[37]: specified group 'video' unknown
Jan  1 00:00:08 buildroot daemon.err udevd[37]: specified group 'lp' unknown
Jan  1 00:00:08 buildroot daemon.err udevd[37]: specified group 'floppy' unknown
Jan  1 00:00:08 buildroot daemon.err udevd[37]: specified group 'cdrom' unknown
Jan  1 00:00:08 buildroot daemon.err udevd[37]: specified group 'tape' unknown

Signed-off-by: Danomi Manchego <danomimanchego123 at gmail.com>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout at mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
---
 system/skeleton/etc/group |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/system/skeleton/etc/group b/system/skeleton/etc/group
index 8fc486d..864d1db 100644
--- a/system/skeleton/etc/group
+++ b/system/skeleton/etc/group
@@ -5,10 +5,18 @@ sys:x:3:
 adm:x:4:
 tty:x:5:
 disk:x:6:
+lp:x:7:
+kmem:x:9:
 wheel:x:10:root
+cdrom:x:11:
+dialout:x:18:
+floppy:x:19:
+video:x:28:
 audio:x:29:
+tape:x:32:
 www-data:x:33:
 utmp:x:43:
+plugdev:x:46:
 staff:x:50:
 lock:x:54:
 haldaemon:x:68: