package/suricata: bump to version 6.0.0

package/suricata: bump to version 6.0.0

- Refresh first patch
- Drop second patch, not needed since
  https://github.com/OISF/suricata/commit/5c725d50502b2a7a747fc04938937b8c6b733aac
- Drop BR2_PACKAGE_GEOIP dependency as suricata switched to GeoIP2, see
  https://github.com/OISF/suricata/commit/a291209e473a261546363f0d9051f1e3b82e699a
- jansson is now a mandatory dependency, see
  https://github.com/OISF/suricata/commit/e49c40428e1b9f7e5dcdb5857c3978d5cb859fd9
- rustc is now a mandatory dependency, see
  https://github.com/OISF/suricata/commit/75429bbe3ea3ff12a9e8e7e863a10ded91cb6de9

EOL date of 4.1 branch is December 31st, 2020.

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>