Our /lib/unicode is a bit out of date, this updates our stripped down
version of UnicodeData.txt that we keep in /lib to cover characters
and code ranges above the Basic Multilingual Plane.

This does balloon the file a bit compared to the ~200k original.
; 800k	/lib/unicode

The full patch is attached.  Of note the non-zero padding of the BMP
range is replicated in the upstream UnicodeData.txt, I would be open
to zero padding ours but this would change the results of existing
scripts that use look(1) with /lib/unicode.

Not sure how much use others get out of /lib/unicode, but wanted
to ask if people thought it was worth the size to update.

Thanks,
moody