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

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

@@ -0,0 +1,21 @@
+package foo
+
+fun bar(i: Int = 0): Int = if (i == 7) i else bar(i - 1)
+
+fun box(): String {
+    val a = bar(10)
+    if (a != 7) return "bar(10) = $a, but expected 7"
+
+    fun boo(i: Int = 0): Int = if (i == 4) i else boo(i - 1)
+    val b = boo(17)
+    if (b != 4) return "boo(17) = $b, but expected 4"
+
+    fun f() = 1
+    val v = 3
+    fun baz(i: Int = 0): Int = if (i == v) f() + v else baz(i - 1)
+
+    val c = baz(10)
+    if (c != 4) return "baz(10) = $c, but expected 4"
+
+    return "OK"
+}