Bug 1749017 - bring the date back in X509CertValidity::FormatTime. r=gregtatum,keeler a=RyanVM

Differential Revision: https://phabricator.services.mozilla.com/D135357

security/manager/ssl/X509CertValidity.cpp

@@ -96,6 +96,7 @@ nsresult X509CertValidity::FormatTime(
   PRExplodedTime explodedTime;
   PR_ExplodeTime(const_cast<PRTime&>(aTimeDate), aParamFn, &explodedTime);
   intl::DateTimeFormat::StyleBag style;
+  style.date = Some(intl::DateTimeFormat::Style::Long);
   style.time = aTimeStyle;
   return intl::AppDateTimeFormat::Format(style, &explodedTime,
                                          aFormattedTimeDate);