message: Add the sanity test for libsodium.
  Tested:
  ./src/test/test_bitcoin --run_test=sanity_tests
diff: @@ -15,6 +15,7 @@ BOOST_AUTO_TEST_CASE(basic_sanity)
  BOOST_CHECK_MESSAGE(glibc_sanity_test() == true, "libc sanity test");
  BOOST_CHECK_MESSAGE(glibcxx_sanity_test() == true, "stdlib sanity test");
  BOOST_CHECK_MESSAGE(ECC_InitSanityCheck() == true, "openssl ECC test");
  + BOOST_CHECK_MESSAGE(init_and_check_sodium() == 0, "libsodium sanity test");
  }
  BOOST_AUTO_TEST_SUITE_END()
  