JS: move expressions test to box tests

js/js.translator/testData/box/expression/misc/lazyProperty.kt

@@ -0,0 +1,20 @@
+var log = ""
+
+fun printlnLog(message: Any) {
+    log += "$message\n"
+}
+
+fun box(): String {
+    printlnLog("Hello, world!")
+    printlnLog(p)
+
+    if (log != "Hello, world!\nGotcha\n3\n") return "fail: $log"
+    return "OK"
+}
+
+
+val p: Int
+    get() {
+        printlnLog("Gotcha")
+        return 3
+    }