tests/unittests/nanocoap: add test case for option_count overflow
tests/unittests/nanocoap: add test case for option_count overflow

lazytech-org/RIOT,lazytech-org/RIOT,kYc0o/RIOT,ant9000/RIOT,rfuentess/RIOT,jasonatran/RIOT,BytesGalore/RIOT,authmillenon/RIOT,miri64/RIOT,josephnoir/RIOT,x3ro/RIOT,mtausig/RIOT,lazytech-org/RIOT,lazytech-org/RIOT,yogo1212/RIOT,basilfx/RIOT,kaspar030/RIOT,RIOT-OS/RIOT,jasonatran/RIOT,x3ro/RIOT,kYc0o/RIOT,josephnoir/RIOT,basilfx/RIOT,toonst/RIOT,OlegHahm/RIOT,ant9000/RIOT,toonst/RIOT,authmillenon/RIOT,cladmi/RIOT,ant9000/RIOT,A-Paul/RIOT,OTAkeys/RIOT,RIOT-OS/RIOT,yogo1212/RIOT,OlegHahm/RIOT,mfrey/RIOT,aeneby/RIOT,cladmi/RIOT,ant9000/RIOT,toonst/RIOT,OTAkeys/RIOT,josephnoir/RIOT,kaspar030/RIOT,RIOT-OS/RIOT,cladmi/RIOT,kaspar030/RIOT,rfuentess/RIOT,aeneby/RIOT,mtausig/RIOT,RIOT-OS/RIOT,miri64/RIOT,yogo1212/RIOT,rfuentess/RIOT,cladmi/RIOT,miri64/RIOT,kaspar030/RIOT,yogo1212/RIOT,OlegHahm/RIOT,A-Paul/RIOT,mtausig/RIOT,kYc0o/RIOT,x3ro/RIOT,kYc0o/RIOT,toonst/RIOT,smlng/RIOT,miri64/RIOT,OTAkeys/RIOT,rfuentess/RIOT,aeneby/RIOT,authmillenon/RIOT,A-Paul/RIOT,OTAkeys/RIOT,jasonatran/RIOT,basilfx/RIOT,jasonatran/RIOT,authmillenon/RIOT,A-Paul/RIOT,aeneby/RIOT,smlng/RIOT,BytesGalore/RIOT,josephnoir/RIOT,BytesGalore/RIOT,jasonatran/RIOT,basilfx/RIOT,toonst/RIOT,mfrey/RIOT,cladmi/RIOT,smlng/RIOT,aeneby/RIOT,OlegHahm/RIOT,mfrey/RIOT,authmillenon/RIOT,mfrey/RIOT,smlng/RIOT,yogo1212/RIOT,A-Paul/RIOT,yogo1212/RIOT,BytesGalore/RIOT,x3ro/RIOT,mtausig/RIOT,basilfx/RIOT,authmillenon/RIOT,kaspar030/RIOT,smlng/RIOT,ant9000/RIOT,lazytech-org/RIOT,josephnoir/RIOT,rfuentess/RIOT,BytesGalore/RIOT,mtausig/RIOT,x3ro/RIOT,miri64/RIOT,OlegHahm/RIOT,RIOT-OS/RIOT,mfrey/RIOT,OTAkeys/RIOT,kYc0o/RIOT