meta-world-pkgdata: Inherit nopackages

Since this is a recipe with PACKAGES = "", inherit the nopackages
class to skip the various packaging functions which wouldn't do anything anyway.

This fixes errors from buildhistory changes where packages-split would be empty.

(From OE-Core rev: fc8ad580c5d76266ad722c9429f39adf5370c2fb)

Signed-off-by: Martin Jansa <martin.jansa@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Steve Sakoman <steve@sakoman.com>