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/numbers/NumbersTest/floatMinMaxValues.kt

@@ -0,0 +1,12 @@
+import kotlin.test.*
+
+
+fun box() {
+    assertTrue(Float.MIN_VALUE > 0)
+    assertTrue(Float.MAX_VALUE > 0)
+
+    // overflow behavior
+    expect(Float.POSITIVE_INFINITY) { Float.MAX_VALUE * 2 }
+    expect(Float.NEGATIVE_INFINITY) { -Float.MAX_VALUE * 2 }
+    expect(0.0F) { Float.MIN_VALUE / 2.0F }
+}