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

compiler/testData/codegen/light-analysis/objects/useImportedMemberFromCompanion.txt

@@ -1,8 +1,10 @@
+@kotlin.Metadata
 public class BaseClass {
     public method <init>(): void
     public final method getFromClass(p0: java.lang.Object): java.lang.Object
 }
 
+@kotlin.Metadata
 public final class Class {
     public final static field C: Class.C
     private static field p: int
@@ -10,6 +12,7 @@ public final class Class {
     public method <init>(): void
 }
 
+@kotlin.Metadata
 public final static class Class/C {
     inner class Class/C
     private method <init>(): void
@@ -26,18 +29,21 @@ public final static class Class/C {
     public final method setP(p0: int): void
 }
 
+@kotlin.Metadata
 public interface I {
     inner class I/DefaultImpls
     public abstract method fromInterface(p0: java.lang.Object): java.lang.Object
     public abstract method genericFromSuper(p0: java.lang.Object): java.lang.Object
 }
 
+@kotlin.Metadata
 public final class I/DefaultImpls {
     inner class I/DefaultImpls
     public static method fromInterface(p0: I, p1: java.lang.Object): java.lang.Object
     public static method genericFromSuper(p0: I, p1: java.lang.Object): java.lang.Object
 }
 
+@kotlin.Metadata
 public final class UseImportedMemberFromCompanionKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }