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

compiler/testData/codegen/light-analysis/reflection/createAnnotation/enumKClassAnnotation.txt

@@ -1,4 +1,5 @@
 @java.lang.annotation.Retention
+@kotlin.Metadata
 public annotation class Anno {
     public abstract method foo(): Foo
     public abstract method foos(): Foo[]
@@ -8,12 +9,14 @@ public annotation class Anno {
     public abstract method levels(): kotlin.DeprecationLevel[]
 }
 
+@kotlin.Metadata
 public final class EnumKClassAnnotationKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
     public final static @Anno method foo(): void
 }
 
 @java.lang.annotation.Retention
+@kotlin.Metadata
 public annotation class Foo {
     public abstract method value(): java.lang.String
 }