client almost builds

vendor/cryptopp/TestPrograms/test_x86_rdrand.cpp

@@ -0,0 +1,10 @@
+#include <immintrin.h>
+#if (__GNUC__ >= 5) || ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 6))
+# include <x86intrin.h>
+#endif
+int main(int argc, char* argv[])
+{
+    unsigned int x=0;
+    (void)_rdrand32_step (&x);
+    return x == 0 ? 0 : 0;
+}