examples/l2util: Updated BOARD_INSUFFICIENT_MEMORY
examples/l2util: Updated BOARD_INSUFFICIENT_MEMORY

Linking works for both blackpill and bluepill

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