jlime-extras: Split machine-specific files, update recipes.

jlime-extras: Split machine-specific files, update recipes.

jlime-extras is now split into two recipes, jlime-extras and
jlime-extras-${MACHINE}, which contains machine-specific files
and on which jlime-extras depends upon.

jlime-extras-ben-nanonote was created, recipes for other machines
are coming up.

jlime-extras was also updated to reflect changes in the source
archive.

Signed-off-by: Alex Ferguson <thoughtmonster@gmail.com>
Signed-off-by: Kristoffer Ericson <kristoffer.ericson@gmail.com>