Make tests about mod and varargs valid for 1.3 version

compiler/testData/codegen/box/annotations/singleAssignmentToVarargInAnnotation.kt

@@ -0,0 +1,29 @@
+// !LANGUAGE: -ProhibitAssigningSingleElementsToVarargsInNamedForm
+// IGNORE_BACKEND: JS_IR
+// TODO: muted automatically, investigate should it be ran for JS or not
+// IGNORE_BACKEND: JS, NATIVE
+
+// WITH_RUNTIME
+
+annotation class Ann(vararg val p: Int)
+
+@Ann(p = 1) class MyClass
+
+fun box(): String {
+    test(MyClass::class.java, "1")
+    return "OK"
+}
+
+fun test(klass: Class<*>, expected: String) {
+    val ann = klass.getAnnotation(Ann::class.java)
+    if (ann == null) throw AssertionError("fail: cannot find Ann on ${klass}")
+
+    var result = ""
+    for (i in ann.p) {
+        result += i
+    }
+
+    if (result != expected) {
+        throw AssertionError("fail: expected = ${expected}, actual = ${result}")
+    }
+}