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

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

@@ -1,11 +1,14 @@
 @java.lang.annotation.Retention
+@kotlin.Metadata
 public annotation class test/A
 
 @java.lang.annotation.Retention
+@kotlin.Metadata
 public annotation class test/B {
     public abstract method s(): java.lang.String
 }
 
+@kotlin.Metadata
 public final class test/EqualsHashCodeToStringKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
     public final static @test.A @test.B method javaReflectionAnnotationInstances(): void