Kapt3: Write stub class files with metadata (needed for incremental compilation)

compiler/testData/codegen/light-analysis/classes/interfaceCompanionInitializationWithJava.txt

@@ -1,7 +1,9 @@
+@kotlin.Metadata
 public final class CompanionInitializationKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }
 
+@kotlin.Metadata
 public interface IStatic {
     public final static field Companion: IStatic.Companion
     public final static field const: int
@@ -10,17 +12,20 @@ public interface IStatic {
     public abstract method doSth(): void
 }
 
+@kotlin.Metadata
 public final static class IStatic/Companion {
     public final static field const: int
     inner class IStatic/Companion
     private method <init>(): void
 }
 
+@kotlin.Metadata
 public final class IStatic/DefaultImpls {
     inner class IStatic/DefaultImpls
     public static method doSth(p0: IStatic): void
 }
 
+@kotlin.Metadata
 public class Static {
     private final field p: java.lang.Object
     public method <init>(): void