Merge to upstream r225300.

Change-Id: I2b23715db9ac129ff80aa78ad5824db0a4d6fbb3

test/std/numerics/rand/rand.predef/ranlux48_base.pass.cpp

@@ -0,0 +1,22 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <random>
+
+// typedef subtract_with_carry_engine<uint_fast64_t, 48,  5, 12>  ranlux48_base;
+
+#include <random>
+#include <cassert>
+
+int main()
+{
+    std::ranlux48_base e;
+    e.discard(9999);
+    assert(e() == 61839128582725ull);
+}