tests: Copy stdlib tests from Kotlin/JVM

This patch copies Kotlin/JVM stdlib tests (libraries/stdlib/test)
excepting ones with explicit java dependencies. It also transforms
the tests to use them as box-tests.

backend.native/tests/external/stdlib/ranges/RangeTest/comparableRange.kt

@@ -0,0 +1,17 @@
+import kotlin.test.*
+
+
+fun box() {
+    val range = "island".."isle"
+    assertFalse("apple" in range)
+    assertFalse("icicle" in range)
+
+    assertTrue("island" in range)
+    assertTrue("isle" in range)
+    assertTrue("islandic" in range)
+
+    assertFalse("item" in range)
+    assertFalse("trail" in range)
+
+    assertFalse(range.isEmpty())
+}