Fix intermitted RuntimeEventSource test.

Commit migrated from dotnet/coreclr@bb2d7a3

src/coreclr/tests/src/tracing/runtimeeventsource/RuntimeEventSourceTest.cs

@@ -101,7 +101,7 @@ protected override void OnEventWritten(EventWrittenEventArgs eventData)
             Console.WriteLine($"TimeStamp: {eventData.TimeStamp.ToLocalTime()}");
             Console.WriteLine($"LocalTime: {DateTime.Now}");
             Console.WriteLine($"Difference: {DateTime.UtcNow - eventData.TimeStamp}");
-            Assert.True("eventData.TimeStamp < DateTime.UtcNow", eventData.TimeStamp < DateTime.UtcNow);
+            Assert.True("eventData.TimeStamp <= DateTime.UtcNow", eventData.TimeStamp <= DateTime.UtcNow);
             for (int i = 0; i < eventData.Payload.Count; i++)
             {
                 string payloadString = eventData.Payload[i] != null ? eventData.Payload[i].ToString() : string.Empty;