Oscilloscope Labratories, the film distribution company owned by MCA of the Beastie Boys has bought Michel Gondry’s documentary, “The Thorn in the Heart,” at Cannes. The movie is about Gondry’s aunt Suzette, and her relationship with her son, Jean-Yves.  It also explores Suzette’s years as a school teacher.  Gondry uncovered new family stories while shooting …