AMC Entertainment Holdings Inc (NYSE: AMC) is bringing its summer movie camp programme back this summer. Shares of the cinema chain are up 15% at writing. What does it mean for the AMC stock?AMC said its summer movie camp programme will go live on June 24 and will remain in place until August 14. During this period, customers will be able to watch select movies for only $3.0 (excluding tax) at its participating theatres. A new title will be available on Monday and Wednesday of each week, as per a press release on Tuesday. Note that over 250 AMC locations across the United States will participa…