libjpeg-turbo: update 1.2.1 / use version 8d to follow oe-core libjpeg update

without following oe-core's version PREFERRED_PROVIDER_jpeg does not work and
libjpeg is build.

Signed-off-by: Andreas Müller <schnitzeltony@googlemail.com>
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>