cve-update-nvd2-native: Fix CVE configuration update

cve-update-nvd2-native: Fix CVE configuration update

When a CVE is created, it often has no precise version information and
this is stored as "-" (matching any version). After an update, version
information is added. The previous "-" must be removed, otherwise, the
CVE is still "Unpatched" for cve-check.

Signed-off-by: Yoann Congal <yoann.congal@smile.fr>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 641ae3f36e09af9932dc33043a0a5fbfce62122e)
Signed-off-by: Steve Sakoman <steve@sakoman.com>