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/runtime/basic/hash0.kt

@@ -0,0 +1,26 @@
+/*
+ * 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 runtime.basic.hash0
+
+import kotlin.test.*
+
+@Test fun runTest() {
+    println(239.hashCode())
+    println((-1L).hashCode())
+    println('a'.hashCode())
+    println(1.0f.hashCode())
+    println(1.0.hashCode())
+    println(true.hashCode())
+    println(false.hashCode())
+    println(Any().hashCode() != Any().hashCode())
+    val a = CharArray(5)
+    a[0] = 'H'
+    a[1] = 'e'
+    a[2] = 'l'
+    a[3] = 'l'
+    a[4] = 'o'
+    println("Hello".hashCode() == String(a, 0, 5).hashCode())
+}