An attacker in an “X-Men” t-shirt randomly bashed an elderly woman with a metal object as she walked in the East Village last week, cops said.  The 68-year-old victim was strolling on East 14th Street near First Avenue, steps from the Stuy Town apartments, around 6:15 p.m. Sept. 22 when the Manhattan menace crept up behind her, police said.  He hit her in the back with an “unknown metal...