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/function/defaults7.kt

@@ -0,0 +1,25 @@
+/*
+ * 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.function.defaults7
+
+import kotlin.test.*
+
+/**
+ * Test fails with code generation:
+ * Call parameter type does not match function signature!
+ * %5 = invoke %struct.ObjHeader* @"kfun:kotlin.native.internal.boxInt(kotlin.Int)"(i32 1, %struct.ObjHeader** %4)
+ * to label %label_ unwind label %cleanup_landingpad
+ * i32  invoke void @"kfun:foo$default(kotlin.Int;kotlin.Int;kotlin.Int)"(%struct.ObjHeader* %5, i32 0, i32 2)
+ * to label %label_1 unwind label %cleanup_landingpad
+ */
+
+fun <T> foo(a : T, b : Int = 42){
+    println(b)
+}
+
+@Test fun runTest() {
+    foo(1)
+}