package/openrc: needs kmod

package/openrc: needs kmod

openrc provides scripts that have been written for the big-gun kmod, and
so use options unknown to the busybox' provided applets:

  - Busybox modprobe does not have a "--first-time" option,
  - the "--verbose" option is just "-v",
  - the "--use-blacklist" option is just "-b". Also blacklist support is
    not selected in our default busybox configuration.

One of two options, is to "fix" or "adapt" openrc's scripts to busybox,
which means for the openrc package to go peek into files from the
busybox package, which is not nice, and can't work because that is not
available by the time we scan our Makefiles.

The other option, which this patch implements, is to just add a
dependency onto kmod and its tools.

Reported-by: Carlos Santos <unixmania@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Cc: Peter Korsgaard <peter@korsgaard.com>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Tested-by: Carlos Santos <unixmania@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>