buildroot

openssh: Add patch to fix compilation with musl libc

The configure script finds the "howmany" macro, but some of the sources
using it do not include the required <sys/param.h> header.

Signed-off-by: Maarten ter Huurne <maarten@treewalker.org>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>