The building of the Berlin Wall, which began Aug. 13, 1961, gave a stark architectural face to the Cold War and spawned a slew of spy movies located on the fault line of East-West intrigue. Hollywood masters like Billy Wilder and Alfred Hitchcock were among the first to spin political fables in this divided city. But in the ’80s and beyond, as Soviet ideology cracked along with its most notorious edifice, German filmmakers addressed their own fissured history.