Write outer class info for closures

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

@@ -0,0 +1,17 @@
+val l: Any = {}
+
+fun box(): String {
+    val enclosingClass = l.javaClass.getEnclosingClass()
+    if (!enclosingClass!!.getName().startsWith("_DefaultPackage-lambdaInPackage-")) return "enclosing class: $enclosingClass"
+
+    val enclosingConstructor = l.javaClass.getEnclosingConstructor()
+    if (enclosingConstructor != null) return "enclosing constructor found: $enclosingConstructor"
+
+    val enclosingMethod = l.javaClass.getEnclosingMethod()
+    if (enclosingMethod != null) return "enclosing method found: $enclosingMethod"
+
+    val declaringClass = l.javaClass.getDeclaringClass()
+    if (declaringClass != null) return "anonymous function has a declaring class: $declaringClass"
+
+    return "OK"
+}