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

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

@@ -1,20 +1,25 @@
+@kotlin.Metadata
 public final class CompanionInitializationKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }
 
+@kotlin.Metadata
 public final class ConcreteWithStatic {
     public final static field Companion: ConcreteWithStatic.Companion
     inner class ConcreteWithStatic/Companion
     public method <init>(): void
 }
 
+@kotlin.Metadata
 public final static class ConcreteWithStatic/Companion {
     inner class ConcreteWithStatic/Companion
     private method <init>(): void
 }
 
+@kotlin.Metadata
 public interface IStatic
 
+@kotlin.Metadata
 public class Static {
     public method <init>(@org.jetbrains.annotations.NotNull p0: IStatic): void
     public final method doSth(): void