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/collections/CollectionTest/min.kt

@@ -0,0 +1,13 @@
+import kotlin.test.*
+import kotlin.comparisons.*
+
+fun box() {
+    expect(null, { listOf<Int>().min() })
+    expect(1, { listOf(1).min() })
+    expect(2, { listOf(2, 3).min() })
+    expect(2000000000000, { listOf(3000000000000, 2000000000000).min() })
+    expect('a', { listOf('a', 'b').min() })
+    expect("a", { listOf("a", "b").min() })
+    expect(null, { listOf<Int>().asSequence().min() })
+    expect(2, { listOf(2, 3).asSequence().min() })
+}