Write outer class info for closures

compiler/testData/codegen/boxWithStdlib/reflection/lambda/lambdaInLocalFunction.kt

@@ -0,0 +1,17 @@
+fun box(): String {
+    fun foo(): Any {
+        return {}
+    }
+
+    val javaClass = foo().javaClass
+    val enclosingMethod = javaClass.getEnclosingMethod()
+    if (enclosingMethod?.getName() != "invoke") return "method: $enclosingMethod"
+
+    val enclosingClass = javaClass.getEnclosingClass()
+    if (enclosingClass!!.getName() != "_DefaultPackage\$box$1") return "enclosing class: $enclosingClass"
+
+    val declaringClass = javaClass.getDeclaringClass()
+    if (declaringClass != null) return "anonymous function has a declaring class: $declaringClass"
+
+    return "OK"
+}