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

compiler/testData/codegen/light-analysis/objects/useImportedMember.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 C {
     public final static field INSTANCE: C
     private static field p: int
@@ -20,18 +22,21 @@ public final 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 UseImportedMemberKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }