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/performance/startup/build.gradle.kts

@@ -0,0 +1,27 @@
+import org.jetbrains.kotlin.gradle.plugin.mpp.NativeBuildType
+import org.jetbrains.kotlin.RunKotlinNativeTask
+import org.jetbrains.kotlin.BenchmarkRepeatingType
+
+/*
+ * Copyright 2010-2020 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.
+ */
+
+plugins {
+    id("benchmarking")
+}
+
+val defaultBuildType = NativeBuildType.RELEASE
+
+benchmark {
+    applicationName = "Startup"
+    commonSrcDirs = listOf("../../tools/benchmarks/shared/src/main/kotlin/report", "src/main/kotlin", "../shared/src/main/kotlin")
+    jvmSrcDirs = listOf("../shared/src/main/kotlin-jvm")
+    nativeSrcDirs = listOf("../shared/src/main/kotlin-native/common")
+    mingwSrcDirs = listOf("../shared/src/main/kotlin-native/mingw")
+    posixSrcDirs = listOf("../shared/src/main/kotlin-native/posix")
+    buildType = (findProperty("nativeBuildType") as String?)?.let { NativeBuildType.valueOf(it) } ?: defaultBuildType
+    repeatingType = BenchmarkRepeatingType.EXTERNAL
+
+    dependencies.common(project(":endorsedLibraries:kotlinx.cli"))
+}

kotlin-native/performance/startup/gradle.properties

@@ -0,0 +1 @@
+kotlin.native.home=../../dist

kotlin-native/performance/startup/src/main/kotlin/main.kt

@@ -0,0 +1,27 @@
+/*
+ * Copyright 2010-2020 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 org.jetbrains.startup.*
+import org.jetbrains.benchmarksLauncher.*
+import kotlinx.cli.*
+
+class StartupLauncher : Launcher() {
+    override val benchmarks = BenchmarksCollection(
+      mutableMapOf(
+          "Singleton.initialize" to BenchmarkEntryManual(::singletonInitialize),
+          "Singleton.initializeNested" to BenchmarkEntryManual(::singletonInitializeNested),
+      )
+    )
+}
+
+fun main(args: Array<String>) {
+    val launcher = StartupLauncher()
+    BenchmarksRunner.runBenchmarks(args, { arguments: BenchmarkArguments ->
+        if (arguments is BaseBenchmarkArguments) {
+            launcher.launch(arguments.warmup, arguments.repeat, arguments.prefix,
+                    arguments.filter, arguments.filterRegex, arguments.verbose)
+        } else emptyList()
+    }, benchmarksListAction = launcher::benchmarksListAction)
+}