Added test checking that initialization order in package part is not violated.

compiler/testData/codegen/box/package/initializationOrder.kt

@@ -0,0 +1,14 @@
+fun box(): String? {
+    val log = System.getProperty("boxtest.log")
+    System.clearProperty("boxtest.log") // test can be run twice
+    return if (log == "bca") "OK" else log
+}
+
+val b = log("b")
+val c = log("c")
+val a = log("a")
+
+fun log(message: String) {
+    val value = (System.getProperty("boxtest.log") ?: "") + message
+    System.setProperty("boxtest.log", value)
+}