cve-update-nvd2-native: added the missing http import

Signed-off-by: Jan Vermaete <jan.vermaete@gmail.com>
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
(cherry picked from commit 39d2cde7)
Signed-off-by: Steve Sakoman <steve@sakoman.com>