They may just be little yellow henchmen, but Illumination’s Minionsdominated its U.S. theatrical debut weekend with more than $115 million in tickets sold. That number make Minions the No. 2 all-time animated feature opener, beating out Toy Story 3′s $108 million opening but not quite topping Shrek the Third’s $121 million tally. Minions has the best opening in theDespicable Me series: the first feature opened 2010 with a $56 million opening-weekend gross; the second opened…