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

compiler/testData/codegen/light-analysis/hashPMap/empty.txt

@@ -1,3 +1,4 @@
+@kotlin.Metadata
 public final class EmptyKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }

compiler/testData/codegen/light-analysis/hashPMap/manyNumbers.txt

@@ -1,3 +1,4 @@
+@kotlin.Metadata
 public final class ManyNumbersKt {
     private final static field N: int
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String

compiler/testData/codegen/light-analysis/hashPMap/rewriteWithDifferent.txt

@@ -1,3 +1,4 @@
+@kotlin.Metadata
 public final class RewriteWithDifferentKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }

compiler/testData/codegen/light-analysis/hashPMap/rewriteWithEqual.txt

@@ -1,3 +1,4 @@
+@kotlin.Metadata
 public final class RewriteWithEqualKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }

compiler/testData/codegen/light-analysis/hashPMap/simplePlusGet.txt

@@ -1,3 +1,4 @@
+@kotlin.Metadata
 public final class SimplePlusGetKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }

compiler/testData/codegen/light-analysis/hashPMap/simplePlusMinus.txt

@@ -1,3 +1,4 @@
+@kotlin.Metadata
 public final class SimplePlusMinusKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }