makefiles: fix LOG_LEVEL handling
makefiles: fix LOG_LEVEL handling


aeneby/RIOT,kaspar030/RIOT,jasonatran/RIOT,x3ro/RIOT,authmillenon/RIOT,yogo1212/RIOT,kYc0o/RIOT,authmillenon/RIOT,jasonatran/RIOT,kYc0o/RIOT,authmillenon/RIOT,x3ro/RIOT,toonst/RIOT,josephnoir/RIOT,authmillenon/RIOT,aeneby/RIOT,RIOT-OS/RIOT,miri64/RIOT,mtausig/RIOT,jasonatran/RIOT,kaspar030/RIOT,mtausig/RIOT,authmillenon/RIOT,yogo1212/RIOT,yogo1212/RIOT,x3ro/RIOT,OTAkeys/RIOT,x3ro/RIOT,miri64/RIOT,aeneby/RIOT,OlegHahm/RIOT,yogo1212/RIOT,toonst/RIOT,OTAkeys/RIOT,ant9000/RIOT,smlng/RIOT,ant9000/RIOT,kaspar030/RIOT,toonst/RIOT,aeneby/RIOT,basilfx/RIOT,RIOT-OS/RIOT,kYc0o/RIOT,miri64/RIOT,kYc0o/RIOT,basilfx/RIOT,OlegHahm/RIOT,RIOT-OS/RIOT,josephnoir/RIOT,smlng/RIOT,aeneby/RIOT,miri64/RIOT,OTAkeys/RIOT,x3ro/RIOT,josephnoir/RIOT,mtausig/RIOT,OlegHahm/RIOT,jasonatran/RIOT,basilfx/RIOT,OTAkeys/RIOT,yogo1212/RIOT,OTAkeys/RIOT,RIOT-OS/RIOT,authmillenon/RIOT,jasonatran/RIOT,yogo1212/RIOT,miri64/RIOT,kaspar030/RIOT,smlng/RIOT,kYc0o/RIOT,mtausig/RIOT,toonst/RIOT,basilfx/RIOT,ant9000/RIOT,OlegHahm/RIOT,smlng/RIOT,josephnoir/RIOT,smlng/RIOT,basilfx/RIOT,ant9000/RIOT,ant9000/RIOT,kaspar030/RIOT,mtausig/RIOT,OlegHahm/RIOT,toonst/RIOT,RIOT-OS/RIOT,josephnoir/RIOT