[BProc] beoboot-cm: new syntax for "head"

[Thomas E. <eck...@gm...>]

Hi all,

"head" is used in "beoboot" (here: beoboot-cm-1.8) when copying
kernel-modules.

Recent coreutils (v5.2.0 tested on amd64) issue a warning that the
	head -N
syntax is obsolete. Simply fixed by using
	head -n N

The attached (trivial) patch ajusts beoboot to the changed syntax

Thomas