child_process: kHideConsoleWindows for spawnSync

kHideConsoleWindows should hide console windows for
execSync and spawnSync calls as well. This fix adds on
to nodejs#39712.

PR-URL: nodejs#41412
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

src/spawn_sync.cc

@@ -810,6 +810,9 @@ Maybe<int> SyncProcessRunner::ParseOptions(Local<Value> js_value) {
   if (js_win_hide->BooleanValue(isolate))
     uv_process_options_.flags |= UV_PROCESS_WINDOWS_HIDE;
 
+  if (env()->hide_console_windows())
+    uv_process_options_.flags |= UV_PROCESS_WINDOWS_HIDE_CONSOLE;
+
   Local<Value> js_wva =
       js_options->Get(context, env()->windows_verbatim_arguments_string())
           .ToLocalChecked();