efibootmgr: Update to version 18

efibootmgr: Update to version 18

- Update from version 17 to 18
- Update of rootfile not required
- Changelog
   bug fixes
    fixed the simple run example by @Katana-Steel in #88
    Restore activation error message in efibootmgr by @rbisewski in #89
    Android: correct the sources list by @cwhuang in #124
    remove-dupes: update error message by @raharper in #127
    Fix typo in manual page by @ferivoz in #136
    README: Note efivarfs as the current required kernel module by @cjmayo in #145
    Fix possible read out of bounds in ucs2_to_utf8 by @dlrobertson in #147
    Migrate CI by @frozencemetery in #153
    Add code of conduct by @frozencemetery in #154
    Fix help messages by @robert-scheck in #156
    Add option for insertion location of new entries by @frozencemetery in #166
   Full changelog can be found from the github repository comparing versio 17 to 18
    https://github.com/rhboot/efibootmgr/compare/17...18

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Reviewed-by: Peter Müller <peter.mueller@ipfire.org>