8275244: Suppress warnings on non-serializable array component types in jdk.management

Reviewed-by: alanb

Author: jddarcy

src/jdk.management/share/classes/com/sun/management/internal/GcInfoCompositeData.java

@@ -55,6 +55,7 @@ public class GcInfoCompositeData extends LazyCompositeData {
     private final GcInfo info;
     @SuppressWarnings("serial") // Type of field is not Serializable
     private final GcInfoBuilder builder;
+    @SuppressWarnings("serial") // Array component type is not Serializable
     private final Object[] gcExtItemValues;
 
     public GcInfoCompositeData(GcInfo info,