Light class codegen: all objects are considered static

Simplify code handling access flag computation
Fix a problem where kotlin nested object wasn't producing a nested light class

compiler/tests/org/jetbrains/kotlin/asJava/CompilerLightClassTestGenerated.java

@@ -72,6 +72,12 @@ public class CompilerLightClassTestGenerated extends AbstractCompilerLightClassT
         doTest(fileName);
     }
 
+    @TestMetadata("NestedObjects.kt")
+    public void testNestedObjects() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/asJava/lightClasses/NestedObjects.kt");
+        doTest(fileName);
+    }
+
     @TestMetadata("compiler/testData/asJava/lightClasses/compilationErrors")
     @TestDataPath("$PROJECT_ROOT")
     @RunWith(JUnit3RunnerWithInners.class)