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

compiler/testData/codegen/light-analysis/jvmStatic/importStaticMemberFromObject.txt

@@ -1,3 +1,4 @@
+@kotlin.Metadata
 public final class C {
     public final static field Companion: C.Companion
     private final static field p1: int
@@ -7,6 +8,7 @@ public final class C {
     public final static method getP1(): int
 }
 
+@kotlin.Metadata
 public final static class C/Companion {
     inner class C/Companion
     private method <init>(): void
@@ -15,10 +17,12 @@ public final static class C/Companion {
     private synthetic deprecated static @kotlin.jvm.JvmStatic method p1$annotations(): void
 }
 
+@kotlin.Metadata
 public final class ImportStaticMemberFromObjectKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }
 
+@kotlin.Metadata
 public final class O {
     public final static field INSTANCE: O
     private final static field p: int