pkg/libhydrogen: add arch 32bit requirement
pkg/libhydrogen: add arch 32bit requirement

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