Add more static binaries to the native-xtools target.  These help speed
up the cross builds significantly.

adding:
bin/sh
bin/csh
sbin/md5
usr.bin/bzip2
usr.bin/fetch
usr.bin/gzip
usr.bin/tar
usr.bin/unzip
usr.bin/xz

Phabric: D1146
Reviewed by:	imp bdrewery
MFC after:	2 weeks


git-svn-id: svn+ssh://svn.freebsd.org/base/head@274490 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f