Add 'xo-randomgen/' from commit '44a31724ec'

git-subtree-dir: xo-randomgen
git-subtree-mainline: 57170366da
git-subtree-split: 44a31724ec

xo-randomgen/example/ex2/ex2.cpp

@@ -0,0 +1,16 @@
+/* @file ex2.cpp */
+
+#include "xo/randomgen/xoshiro256.hpp"
+#include "xo/randomgen/random_seed.hpp"
+
+using namespace xo;
+using namespace xo::rng;
+
+int
+main(int argc, char ** argv) {
+    Seed<xoshiro256ss> seed;
+
+    xoshiro256ss eng(seed);
+} /*main*/
+
+/* end ex2.cpp */