shell_commands/sc_gnrc_netif: set 6Lo flag
shell_commands/sc_gnrc_netif: set 6Lo flag

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