8231546: Suppress warnings on non-serializable instance fields in java.prefs module Reviewed-by: rriggs

8231314: java.time serialization warning cleanup Reviewed-by: chegar, naoto, plevart

8231467: Missing make prerequisite declaration corrupts make dependency files on Windows Reviewed-by: ihse, tbell

8231382: Use main class from main module if available Submitted-by: almatvee Reviewed-by: herrick, asemenyuk