Write/read module annotation FQ names to/from metadata on JVM

#KT-22759 In Progress

compiler/tests/org/jetbrains/kotlin/codegen/JvmModuleProtoBufTest.kt

@@ -31,7 +31,8 @@ class JvmModuleProtoBufTest : KtUsefulTestCase() {
     private fun doTest(
             relativeDirectory: String,
             compileWith: LanguageVersion = LanguageVersion.LATEST_STABLE,
-            loadWith: LanguageVersion = LanguageVersion.LATEST_STABLE
+            loadWith: LanguageVersion = LanguageVersion.LATEST_STABLE,
+            extraOptions: List<String> = emptyList()
     ) {
         val directory = KotlinTestUtils.getTestDataPathBase() + relativeDirectory
         val tmpdir = KotlinTestUtils.tmpDir(this::class.simpleName)
@@ -42,7 +43,7 @@ class JvmModuleProtoBufTest : KtUsefulTestCase() {
                 "-d", tmpdir.path,
                 "-module-name", moduleName,
                 "-language-version", compileWith.versionString
-        ))
+        ) + extraOptions)
 
         val mapping = ModuleMapping.create(
                 File(tmpdir, "META-INF/$moduleName.${ModuleMapping.MAPPING_FILE_EXT}").readBytes(), "test",
@@ -51,6 +52,9 @@ class JvmModuleProtoBufTest : KtUsefulTestCase() {
                 )
         )
         val result = buildString {
+            for (annotationClassId in mapping.moduleData.annotations) {
+                appendln("@${annotationClassId.asString()}")
+            }
             for ((fqName, packageParts) in mapping.packageFqName2Parts) {
                 appendln(fqName)
                 for (part in packageParts.parts) {
@@ -88,4 +92,17 @@ class JvmModuleProtoBufTest : KtUsefulTestCase() {
         doTest("/moduleProtoBuf/jvmPackageNameLanguageVersion11",
                compileWith = LanguageVersion.KOTLIN_1_2, loadWith = LanguageVersion.KOTLIN_1_1)
     }
+
+    fun testExperimental() {
+        doTest(
+            "/moduleProtoBuf/experimental", extraOptions = listOf(
+                "-Xskip-runtime-version-check",
+                "-language-version",
+                "1.3",
+                "-Xexperimental=org.foo.A",
+                "-Xexperimental=org.foo.B.C",
+                "-Xuse-experimental=org.foo.D"
+            )
+        )
+    }
 }