Bugzilla Bug 188278

Bootchart support would really be nice in making comparisons with baselayout-1.
Also, it will be required for the future use of bootchart once baselayout-1
gets obsoleted.

22:36 <@dberkholz> Uber: so to return to the original point, you didn't really 
                   see that much speedup from baselayout-1 + bash to 
                   baselayout-2 + busybox/dash?
22:38 <@Uber> dberkholz: i've never quatified it - it just "feels" faster
22:38 <@Uber> dberkholz: if you like I could knock up a rc with resources 
              timers in
22:39 <@Uber> dberkholz: if you want that post a bug so I can do that
22:39 <@Uber> it probably needs to be done
22:39 <@Uber> ah!
22:39 <@dberkholz> Uber: couldn't bootchart already do that
22:39 <@Uber> better yet, gimmie a bug about porting bootchart to baselayout-2
22:39 <@Uber> yeah
22:39 <@Uber> :)

I've just added -r2 which has different installation instructions - turned out
the custom hook we added was because of the way our rc system worked, so we no
longer need it. We just need to launch it the "proper" way as advertised
upstream now, by appending init=/sbin/bootchartd to the command line.

I've also patched it to remove a bashism from /sbin/bootchartd as it uses
/bin/sh

Tested on bash and dash shells just fine. For it to work on busybox, you'll
need to set the SAMPLE_PERIOD value in /etc/bootchartd.conf to whole seconds.
I'll see if I can patch bb to follow linux and freebsd convetion which allows
this as POSIX does not.