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/interop/basics/globals.kt

@@ -0,0 +1,33 @@
+/*
+ * 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.
+ */
+
+import kotlinx.cinterop.*
+import cglobals.*
+
+fun main(args: Array<String>) {
+    assert(g1__ == 42)
+
+    assert(g2 == 17)
+    g2 = 42
+    assert(g2 == 42)
+
+    assert(g3.x == 128)
+    g3.x = 7
+    assert(g3.x == 7)
+
+    assert(g4[1] == 14)
+    g4[1] = 15
+    assert(g4[1] == 15)
+
+    assert(g5[0] == 15)
+    assert(g5[3] == 18)
+    g5[0] = 16
+    assert(g5[0] == 16)
+
+    assert(g6 == g3.ptr)
+
+    assert(g8.toLong() == 0x1L)
+    assert(g9.toLong() == 0x2L)
+}