ANGELINE L. JONES, 64, board chairwoman of Jomandi Productions, Atlanta's major black theater group, died Friday of a brain tumor. As Jomandi's head, Mrs. Jones led efforts to develop 25 original productions and performed in two, If God Was a Blues Singer and Buddy Bolden's Blues. Jomandi has gained increasing critical respect in recent years and received national attention during the 1988 National Black Arts Festival in Atlanta. ALLEN RIVKIN, 86, a screenwriter and a founder of the Screenwriters Guild, died Saturday in West Hollywood, Calif., of kidney failure. His best-known film was a World War II feature, Joe Smith, American, which starred Robert Young and Marsha Hunt. Mr. Rivkin and his wife, Laura Kerr, collaborated on the screenplay for The Farmer's Daughter, the 1947 film for which Loretta Young won an Academy Award as best actress.