Kapt: Add Kotlin location to diagnostics reported in Kapt stubs

plugins/kapt3/kapt3-compiler/testData/kotlinRunner/NestedClasses.it.txt

@@ -5,10 +5,29 @@ public final class NonExistentClass {
 
 ////////////////////
 
+package kapt.internal;
+
+public @interface KaptMetadata {
+
+    public java.lang.String value();
+}
+
+////////////////////
+
+package kapt.internal;
+
+public @interface KaptSignature {
+
+    public java.lang.String value();
+}
+
+////////////////////
+
 package test;
 
 @kotlin.Metadata()
 @java.lang.annotation.Retention(value = java.lang.annotation.RetentionPolicy.RUNTIME)
+@kapt.internal.KaptMetadata()
 public abstract @interface MyAnnotation {
 }
 
@@ -17,13 +36,16 @@ public abstract @interface MyAnnotation {
 package test;
 
 @kotlin.Metadata()
+@kapt.internal.KaptMetadata()
 public final class Simple {
     public static final test.Simple.Companion Companion = null;
 
     @MyAnnotation()
+    @kapt.internal.KaptSignature("myMethod()V")
     public final void myMethod() {
     }
 
+    @kapt.internal.KaptSignature("<init>()V")
     public Simple() {
         super();
     }
@@ -31,6 +53,7 @@ public final class Simple {
     @kotlin.Metadata()
     public static final class NestedClass {
 
+        @kapt.internal.KaptSignature("<init>()V")
         public NestedClass() {
             super();
         }
@@ -38,6 +61,7 @@ public final class Simple {
         @kotlin.Metadata()
         public static final class NestedNestedClass {
 
+            @kapt.internal.KaptSignature("<init>()V")
             public NestedNestedClass() {
                 super();
             }
@@ -47,6 +71,7 @@ public final class Simple {
     @kotlin.Metadata()
     public final class InnerClass {
 
+        @kapt.internal.KaptSignature("<init>(Ltest/Simple;)V")
         public InnerClass() {
             super();
         }
@@ -55,6 +80,7 @@ public final class Simple {
     @kotlin.Metadata()
     public static final class Companion {
 
+        @kapt.internal.KaptSignature("<init>()V")
         private Companion() {
             super();
         }