sys-apps/baselayout: set kernel.watchdog_thresh sysctl to 10 seconds

sys-apps/baselayout: set kernel.watchdog_thresh sysctl to 10 seconds

kernel.softlockup_thresh was changed to kernel.watchdog_thresh in the
new kernels.

BUG=13326
TEST=See below.

localhost ~ # cat /proc/sys/kernel/watchdog_thresh
60
localhost ~ # gmerge baselayout
...
localhost ~ # reboot
localhost ~ # logout
Connection to machine closed.
msb@msb:~
$ ssh root@machine
Last login: Fri Apr  1 16:03:09 PDT 2011 from host on pts/0
localhost ~ # cat /proc/sys/kernel/watchdog_thresh
10

Change-Id: I47445264f1b9fba09ffd9271123ce75d96e78f53

R=vbendeb@chromium.org,dianders@chromium.org,bfreed@chromium.org

Committed: http://chrome-svn/viewvc/chromeos?view=rev&revision=1f336a9

[vb, 2011-04-02 18:06:42]

http://codereview.chromium.org/6794003/diff/1/sys-apps/baselayout/files/sysct...
File sys-apps/baselayout/files/sysctl.conf (right):

http://codereview.chromium.org/6794003/diff/1/sys-apps/baselayout/files/sysct...
sys-apps/baselayout/files/sysctl.conf:44: kernel.watchdog_thresh = 10
is this communicated through kernel command line? 

If so, will this result in both options present in all command lines? Would it
be better to make this conditional and kernel version specific?

Just a thought, if other reviewers do not mind - lgtm.

[diandersAtChromium, 2011-04-04 16:46:46]

Haven't played with sysctl.conf, but the man page implies that it doesn't go on
the command line.  The file appears to be read in at bootup by
/etc/init/procps.conf

LGTM.