[K/N][Tests] Migrate test withSpaces.kt

^KT-61259

native/native.tests/testData/interop/withSpaces/custom headers/custom.h

@@ -0,0 +1,7 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+int custom_strcmp(const char* str1, const char* str2) {
+    return strcmp(str1, str2);
+}

native/native.tests/testData/interop/withSpaces/withSpaces.kt

@@ -0,0 +1,11 @@
+/*
+ * Copyright 2010-2023 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 kotlin.test.*
+import kotlinx.cinterop.*
+import withSpaces.*
+
+fun main(args: Array<String>) {
+    customCompare("first", "second")
+}