sys/evtimer: add helper for retrieving the current system time
sys/evtimer: add helper for retrieving the current system time

yogo1212/RIOT,kYc0o/RIOT,authmillenon/RIOT,OlegHahm/RIOT,miri64/RIOT,ant9000/RIOT,authmillenon/RIOT,yogo1212/RIOT,OlegHahm/RIOT,yogo1212/RIOT,ant9000/RIOT,RIOT-OS/RIOT,OlegHahm/RIOT,authmillenon/RIOT,basilfx/RIOT,miri64/RIOT,authmillenon/RIOT,ant9000/RIOT,authmillenon/RIOT,RIOT-OS/RIOT,ant9000/RIOT,kaspar030/RIOT,kYc0o/RIOT,jasonatran/RIOT,jasonatran/RIOT,basilfx/RIOT,jasonatran/RIOT,yogo1212/RIOT,basilfx/RIOT,OTAkeys/RIOT,jasonatran/RIOT,kaspar030/RIOT,authmillenon/RIOT,OlegHahm/RIOT,kYc0o/RIOT,OTAkeys/RIOT,RIOT-OS/RIOT,miri64/RIOT,kYc0o/RIOT,jasonatran/RIOT,OlegHahm/RIOT,yogo1212/RIOT,kaspar030/RIOT,OTAkeys/RIOT,RIOT-OS/RIOT,basilfx/RIOT,kaspar030/RIOT,OTAkeys/RIOT,miri64/RIOT,kaspar030/RIOT,miri64/RIOT,basilfx/RIOT,RIOT-OS/RIOT,OTAkeys/RIOT,yogo1212/RIOT,ant9000/RIOT,kYc0o/RIOT