Enabling arc4random API for the random generator on BSD

Those two BSD flavors supports this API since long years
and underlyingly it is a ChaCha flavor with good performances.

Change-Id: Ic4266f5ef3e17af95de97844a6b7ebba4a56802d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1869200Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64454}

src/base/utils/random-number-generator.cc

@@ -51,7 +51,7 @@ RandomNumberGenerator::RandomNumberGenerator() {
   result = rand_s(&second_half);
   DCHECK_EQ(0, result);
   SetSeed((static_cast<int64_t>(first_half) << 32) + second_half);
-#elif V8_OS_MACOSX
+#elif V8_OS_MACOSX || V8_OS_FREEBSD || V8_OS_OPENBSD
   // Despite its prefix suggests it is not RC4 algorithm anymore.
   // It always succeeds while having decent performance and
   // no file descriptor involved.