A referendum in Glendale aimed at stopping the city's $308 million Phoenix Coyotes arena deal has fallen short of the voter petition signatures needed to get it on the ballot. Opponents of the Coyotes deal failed to collect the 6,900 signatures they needed to take a November arena deal approved by the Glendale City Council to a public vote. "I have to report that we did not get enough signatures to make our referendum a success," said Ken Jones, one of the failed efforts' organizers. Jones was…