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

compiler/testData/codegen/light-analysis/evaluate/simpleCallBinary.txt

@@ -1,5 +1,6 @@
 @kotlin.annotation.Retention
 @java.lang.annotation.Retention
+@kotlin.Metadata
 public annotation class Ann {
     public abstract method p1(): int
     public abstract method p2(): int
@@ -9,10 +10,12 @@ public annotation class Ann {
 }
 
 @Ann
+@kotlin.Metadata
 public final class MyClass {
     public method <init>(): void
 }
 
+@kotlin.Metadata
 public final class SimpleCallBinaryKt {
     public final static field prop1: int
     public final static field prop2: int