Check class source in bytecode listing tests

compiler/testData/codegen/bytecodeListing/annotations/kt9320.txt

@@ -1,23 +1,29 @@
 @java.lang.annotation.Retention
 @kotlin.Metadata
-public annotation class Ann
+public annotation class Ann {
+    // source: 'kt9320.kt'
+}
 
 @kotlin.annotation.Target
 @kotlin.annotation.Retention
 @java.lang.annotation.Retention
 @java.lang.annotation.Target
 @kotlin.Metadata
-public annotation class AnnExpr
+public annotation class AnnExpr {
+    // source: 'kt9320.kt'
+}
 
 @Ann
 @kotlin.Metadata
 public final class Kt9320Kt$foo$v$1 {
+    // source: 'kt9320.kt'
     inner (anonymous) class Kt9320Kt$foo$v$1
     method <init>(): void
 }
 
 @kotlin.Metadata
 final class Kt9320Kt$foo$w$1 {
+    // source: 'kt9320.kt'
     public final static field INSTANCE: Kt9320Kt$foo$w$1
     inner (anonymous) class Kt9320Kt$foo$w$1
     static method <clinit>(): void
@@ -28,6 +34,7 @@ final class Kt9320Kt$foo$w$1 {
 
 @kotlin.Metadata
 public final class Kt9320Kt {
+    // source: 'kt9320.kt'
     inner (anonymous) class Kt9320Kt$foo$v$1
     inner (anonymous) class Kt9320Kt$foo$w$1
     public final static method foo(): void
@@ -36,5 +43,6 @@ public final class Kt9320Kt {
 @Ann
 @kotlin.Metadata
 public class My {
+    // source: 'kt9320.kt'
     public method <init>(): void
 }