bin/stable*: document them better

They are going to be merged with kernel scripts, so that users know
what to do with them.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
bin/stable*: now moved to suse kernel dir

See:
http://gitorious.org/opensuse/kernel-source/commits/scripts

Signed-off-by: Jiri Slaby <jslaby@suse.cz>