message: configure.ac: remove Bashism
diff: @@ -1930,7 +1930,7 @@ if test x$bitcoin_enable_qt != xno; then
  echo " with qr = $use_qr"
  fi
  echo " with zmq = $use_zmq"
  -if test x$enable_fuzz == xno; then
  +if test x$enable_fuzz = xno; then
  echo " with test = $use_tests"
  else
  echo " with test = not building test_bitcoin because fuzzing is enabled"
  