package/open-lldp: bump to version 1.1

- Drop first patch (not needed since
  https://github.com/intel/openlldp/commit/7ae79b0dff53a23fa0a964f77b9e3bb387a293c4)
- Drop second patch (not needed since
  https://github.com/intel/openlldp/commit/dc35fb92dade6ac88a0b96c3395fd77eb94eaf58)
- Drop other patches (already in version)
- systemd is an optional dependency since
  https://github.com/intel/openlldp/commit/5a0add7b097e0b35b96a477d56c3bb076c475b03

https://github.com/intel/openlldp/releases/tag/v1.1



Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>