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/runtime/generator/build.gradle

@@ -0,0 +1,20 @@
+configurations {
+    generatorRuntime
+}
+
+repositories {
+  maven { url buildKotlinCompilerRepo }
+}
+
+dependencies {
+    generatorRuntime "org.jetbrains.kotlin:kotlin-stdlib:${kotlinStdlibVersion}"
+    generatorRuntime "org.jetbrains.kotlin:kotlin-reflect:${kotlinVersion}"
+    generatorRuntime "org.jetbrains.kotlin:kotlin-stdlib-gen:${kotlinStdlibVersion}"
+}
+
+task run(type: JavaExec) {
+    group 'application'
+    main 'generators.GenerateStandardLibKt'
+    classpath configurations.generatorRuntime
+    args = ["native", "${project(":runtime").projectDir}/src/main/kotlin/generated"]
+}