Update brightnessctl to rev 4 via SR 769819
    
    https://build.opensuse.org/request/show/769819
    by user agentdero + dimstar_suse
    -  Upgrade to the recently released 0.5.1, which includes previously applied
       patches
    Removed patches (adding this for the bot):
       0001-Fixed-inconsistency-in-README-thanks-AJGQ.patch
       0002-Support-the-new-SetBrightness-logind-API.patch
       0003-Make-the-use-of-SetBrightness-dynamic.patch
       0004-Use-non-suid-permissions-when-logind-is-used.patch