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/interop/basics/cglobals.def

@@ -0,0 +1,33 @@
+---
+const int g1 = 42;
+
+int g2 = 17;
+
+struct S {
+    int x;
+} g3 = { 128 };
+
+int g4[2] = { 13, 14 };
+
+int g5[2][2] = { 15, 16, 17, 18 };
+
+struct S* const g6 = &g3;
+
+void foo() {
+    // Test that local vars are not treated as global ones.
+    float g1;
+}
+
+// Test non-compilable variable:
+typedef int MyInt;
+MyInt g7;
+#define g7 bad macro
+
+// Test property name mangling:
+struct g1 {};
+struct g1_ {};
+
+typedef void* voidptr;
+_Pragma("clang assume_nonnull begin")
+const voidptr g8 = 0x1, g9 = 0x2;
+_Pragma("clang assume_nonnull end")