Move everything under kotlin-native folder

I was forced to manually do update the following files, because otherwise
they would be ignored according .gitignore settings. Probably they
should be deleted from repo.

Interop/.idea/compiler.xml
Interop/.idea/gradle.xml
Interop/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_runtime_1_0_3.xml
Interop/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_1_0_3.xml
Interop/.idea/modules.xml
Interop/.idea/modules/Indexer/Indexer.iml
Interop/.idea/modules/Runtime/Runtime.iml
Interop/.idea/modules/StubGenerator/StubGenerator.iml
backend.native/backend.native.iml
backend.native/bc.frontend/bc.frontend.iml
backend.native/cli.bc/cli.bc.iml
backend.native/cli.bc/src/org/jetbrains/kotlin/cli/bc/K2Native.kt
backend.native/cli.bc/src/org/jetbrains/kotlin/cli/bc/K2NativeCompilerArguments.kt
backend.native/tests/link/lib/foo.kt
backend.native/tests/link/lib/foo2.kt
backend.native/tests/teamcity-test.property

kotlin-native/backend.native/tests/codegen/initializers/correctOrder1.kt

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the LICENSE file.
+ */
+
+package codegen.initializers.correctOrder1
+
+import kotlin.test.*
+
+class TestClass {
+    val x: Int
+
+    init {
+        x = 42
+    }
+
+    val y = x
+}
+
+@Test fun runTest() {
+    println(TestClass().y)
+}

kotlin-native/backend.native/tests/codegen/initializers/correctOrder2.kt

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the LICENSE file.
+ */
+
+package codegen.initializers.correctOrder2
+
+import kotlin.test.*
+
+class TestClass {
+    val x: Int
+
+    val y = 42
+
+    init {
+        x = y
+    }
+}
+
+@Test fun runTest() {
+    println(TestClass().x)
+}

kotlin-native/backend.native/tests/codegen/initializers/linkTest1_lib.kt

@@ -0,0 +1,3 @@
+val a = 10
+val b = a * 6
+val c = a * b * 2

kotlin-native/backend.native/tests/codegen/initializers/linkTest1_main.kt

@@ -0,0 +1 @@
+fun main() = println(c)

kotlin-native/backend.native/tests/codegen/initializers/linkTest2_lib.kt

@@ -0,0 +1,3 @@
+val a = mutableListOf<Int>()
+val b = 1.also { a += 2 }
+val c = a.single()

kotlin-native/backend.native/tests/codegen/initializers/linkTest2_main.kt

@@ -0,0 +1 @@
+fun main() = println(c)

kotlin-native/backend.native/tests/codegen/initializers/sharedVarInInitBlock_lib.kt

@@ -0,0 +1,13 @@
+class A {
+    val x: Int
+
+    init {
+        var y = 10
+
+        fun foo() { y = 42 }
+
+        foo()
+
+        x = y
+    }
+}

kotlin-native/backend.native/tests/codegen/initializers/sharedVarInInitBlock_main.kt

@@ -0,0 +1,3 @@
+import kotlin.test.*
+
+fun main() = assertEquals(42, (A().x))