Generate field for const-val with same visibility as desciptor

Also add test checking that constant static final fields generated for them

compiler/backend/src/org/jetbrains/kotlin/codegen/AsmUtil.java

@@ -365,6 +365,8 @@ public class AsmUtil {
             }
         }
 
+        if (memberDescriptor instanceof PropertyDescriptor && ((PropertyDescriptor) memberDescriptor).isConst()) return null;
+
         if (containingDeclaration instanceof PackageFragmentDescriptor) {
             return ACC_PUBLIC;
         }

compiler/backend/src/org/jetbrains/kotlin/codegen/PropertyCodegen.java

@@ -300,10 +300,11 @@ public class PropertyCodegen {
         boolean hasPublicFieldAnnotation = AnnotationsPackage.findPublicFieldAnnotation(propertyDescriptor) != null;
 
         FieldOwnerContext backingFieldContext = context;
+        boolean takeVisibilityFromDescriptor = propertyDescriptor.isLateInit() || propertyDescriptor.isConst();
         if (AsmUtil.isInstancePropertyWithStaticBackingField(propertyDescriptor) ) {
             modifiers |= ACC_STATIC;
 
-            if (propertyDescriptor.isLateInit()) {
+            if (takeVisibilityFromDescriptor) {
                 modifiers |= getVisibilityAccessFlag(propertyDescriptor);
             }
             else if (hasPublicFieldAnnotation && !isDelegate) {
@@ -320,7 +321,7 @@ public class PropertyCodegen {
                 v.getSerializationBindings().put(STATIC_FIELD_IN_OUTER_CLASS, propertyDescriptor);
             }
         }
-        else if (propertyDescriptor.isLateInit()) {
+        else if (takeVisibilityFromDescriptor) {
             modifiers |= getVisibilityAccessFlag(propertyDescriptor);
         }
         else if (!isDelegate && hasPublicFieldAnnotation) {