JS: create new common directory for all generated tests, migrate several tests there

js/js.translator/testData/box/closure/closureReferencingMember.kt

@@ -0,0 +1,38 @@
+package foo
+
+class A() {
+    var i = 0
+
+    fun boo() = 1
+
+    fun f() {
+        for (j in 0..2) {
+            foo {
+                i += j + boo()
+            }
+        }
+    }
+}
+
+fun A.bar(): Int {
+    for (u in 4..7) {
+        foo {
+            i += u + boo()
+        }
+    }
+
+    return i
+}
+
+fun foo(f: () -> Unit) {
+    f()
+}
+
+fun box(): String {
+    val a = A()
+    a.f()
+    if (a.i != 6) return "fail1: ${a.i}"
+    if (a.bar() != 32) return "fail2: ${a.bar()}"
+
+    return "OK"
+}