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

settings.gradle

@@ -1,77 +0,0 @@
-
-/*
- * Copyright 2010-2017 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-include ':dependencies'
-include ':Interop:Indexer'
-include ':Interop:JsRuntime'
-include ':Interop:StubGenerator'
-include ':Interop:Runtime'
-include ':llvmCoverageMappingC'
-include ':llvmDebugInfoC'
-include ':libclangext'
-include ':klib'
-include ':backend.native'
-include ':runtime'
-include ':common'
-include ':backend.native:tests'
-include ':backend.native:debugger-tests'
-include ':utilities:basic-utils'
-include ':utilities:cli-runner'
-include ':dependencyPacker'
-
-include ':performance'
-include ':performance:ring'
-include ':performance:cinterop'
-include ':performance:helloworld'
-include ':performance:numerical'
-include ':performance:videoplayer'
-include ':performance:framework'
-include ':performance:startup'
-if (System.getProperty("os.name") == "Mac OS X") {
-    include ':performance:objcinterop'
-    include ':performance:swiftinterop'
-    if (hasProperty("runExcludedBenchmarks")) {
-        include ':performance:KotlinVsSwift'
-        include ':performance:KotlinVsSwift:ring'
-    }
-}
-
-include ':platformLibs'
-include ':endorsedLibraries'
-include ':endorsedLibraries:kotlinx.cli'
-
-if (hasProperty("kotlinProjectPath")) {
-    include ':runtime:generator'
-    includeBuild(kotlinProjectPath) {
-        dependencySubstitution {
-            substitute module("org.jetbrains.kotlin:kotlin-compiler:$kotlinVersion") with project(':include:kotlin-compiler')
-            substitute module("org.jetbrains.kotlin:kotlin-stdlib-common:$kotlinStdlibVersion") with project(':include:kotlin-stdlib-common-sources')
-            substitute module("org.jetbrains.kotlin:kotlin-stdlib-gen:$kotlinStdlibVersion") with project(':tools:kotlin-stdlib-gen')
-            substitute module("org.jetbrains.kotlin:kotlin-util-io:$kotlinVersion") with project(':kotlin-util-io')
-            substitute module("org.jetbrains.kotlin:kotlin-util-klib:$kotlinVersion") with project(':kotlin-util-klib')
-            substitute module("org.jetbrains.kotlin:kotlin-util-klib-metadata:$kotlinVersion") with project(':kotlin-util-klib-metadata')
-            substitute module("org.jetbrains.kotlin:kotlin-native-utils:$kotlinVersion") with project(':native:kotlin-native-utils')
-            substitute module("org.jetbrains.kotlin:kotlin-reflect:$kotlinVersion") with project(':kotlin-reflect')
-            substitute module("org.jetbrains.kotlinx:kotlinx-metadata-klib") with project(':kotlinx-metadata-klib')
-        }
-    }
-}
-
-includeBuild 'shared'
-includeBuild 'build-tools'
-includeBuild 'tools/kotlin-native-gradle-plugin'
-