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/tools/scripts/update_xcode.sh

@@ -0,0 +1,39 @@
+#!/usr/bin/env bash
+set -e
+
+# "brew install coreutils" for grealpath.
+KONAN_TOOLCHAIN_VERSION=xcode_12_0
+SDKS="macosx iphoneos iphonesimulator appletvos appletvsimulator watchos watchsimulator"
+TARBALL_macosx=target-sysroot-$KONAN_TOOLCHAIN_VERSION-macos_x64
+TARBALL_iphoneos=target-sysroot-$KONAN_TOOLCHAIN_VERSION-ios_arm64
+TARBALL_iphonesimulator=target-sysroot-$KONAN_TOOLCHAIN_VERSION-ios_x64
+TARBALL_appletvos=target-sysroot-$KONAN_TOOLCHAIN_VERSION-tvos_arm64
+TARBALL_appletvsimulator=target-sysroot-$KONAN_TOOLCHAIN_VERSION-tvos_x64
+TARBALL_watchos=target-sysroot-$KONAN_TOOLCHAIN_VERSION-watchos_arm32
+TARBALL_watchsimulator=target-sysroot-$KONAN_TOOLCHAIN_VERSION-watchos_x86
+TARBALL_xcode=target-toolchain-$KONAN_TOOLCHAIN_VERSION-macos_x64
+TARBALL_xcode_addon=xcode-addon-$KONAN_TOOLCHAIN_VERSION-macos_x64
+OUT=`pwd`
+
+for s in $SDKS; do
+  p=`xcrun --sdk $s --show-sdk-path`
+  p=`grealpath $p`
+  tarball_var=TARBALL_${s}
+  tarball=${!tarball_var}
+  echo "Packing SDK $s as $OUT/$tarball.tar.gz..."
+  $SHELL -c "tar czf $OUT/$tarball.tar.gz -C $p -s '/^\./$tarball/HS'  ."
+done
+
+t=`xcrun -f ld`
+t=`dirname $t`
+t=`grealpath $t/../..`
+tarball=$TARBALL_xcode
+echo "Packing toolchain $OUT/$tarball.tar.gz..."
+$SHELL -c "tar czf $OUT/$tarball.tar.gz -C $t -s '/^\./$tarball/HS'  ."
+
+t=`xcrun -f bitcode-build-tool`
+t=`dirname $t`
+t=`grealpath $t/..`
+tarball=$TARBALL_xcode_addon
+echo "Packing additional tools $OUT/$tarball.tar.gz..."
+$SHELL -c "tar czf $OUT/$tarball.tar.gz -C $t -s '/^\./$tarball/HS'  ."