Support JvmPackageName annotation in JVM back-end

This annotation is currently internal because we only commit to its
support for our own libraries. It will be used to change JVM package
names of declarations in JDK-specific stdlib additions (now called
kotlin-stdlib-jre7/8), both to preserve source compatibility of the old
Kotlin code and to solve the split package problem (KT-19258)

js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java

@@ -11733,6 +11733,15 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
         }
     }
 
+    @TestMetadata("compiler/testData/codegen/box/jvmPackageName")
+    @TestDataPath("$PROJECT_ROOT")
+    @RunWith(JUnit3RunnerWithInners.class)
+    public static class JvmPackageName extends AbstractJsCodegenBoxTest {
+        public void testAllFilesPresentInJvmPackageName() throws Exception {
+            KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/box/jvmPackageName"), Pattern.compile("^(.+)\\.kt$"), TargetBackend.JS, true);
+        }
+    }
+
     @TestMetadata("compiler/testData/codegen/box/jvmStatic")
     @TestDataPath("$PROJECT_ROOT")
     @RunWith(JUnit3RunnerWithInners.class)