systemd: set CVE_PRODUCT

systemd: set CVE_PRODUCT

systemd.inc is used by systemd, systemd-boot and
systemd-tools-native recipes so make sure all
match to "systemd" product in CVE database. The
split between systemd, systemd-boot and
systemd-tools-native is specific to oe-core and
upstream just refers to systemd. Not limiting
to "systemd_project" vendor since multiple
vendor names have been used in the past.

Signed-off-by: Mikko Rapeli <mikko.rapeli@linaro.org>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit eb46ad379170f0a80ac2d061fa02c118f5ed1d31)
Signed-off-by: Steve Sakoman <steve@sakoman.com>