sysvinit: pidof add -m option for lsbinitscripts

sysvinit: pidof add -m option for lsbinitscripts

When reboot the system on lsb image, some kill processes would print the
following message:
...
pidof: invalid options on command line!
...

The killproc in lsbinitscripts invokes pidof with option -m, but the pidof
in sysvinit package doesn't support this.

Backport from fedora to add -m option on pidof could fix this issue.

[YOCTO #4896]

Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>