TestRunner support in test's build.gradle

* Fixes to tests
 * RunKonanTest runs tests build with TestRunner
 * Standalone tests

backend.native/tests/serialization/deserialize_members.kt

@@ -1,10 +1,6 @@
-package serialization.deserialize_members
+import foo.bar.*
 
-import kotlin.test.*
-
-import serialization.serialize_members.*
-
-@Test fun runTest() {
+fun main(args: Array<String>) {
     val c = C()
     val d = C.D()
     val e = C.D.E()

backend.native/tests/serialization/serialize_members.kt

@@ -1,4 +1,4 @@
-package serialization.serialize_members
+package foo.bar
 
 class R<T> {
     inline fun bar(t: T) {