Google Calendar testing: avoid test failure because of BYMONTHDAY=6

Google Calendar modifies the RRULE of a recurring event. The
transformation is semantically correct, but breaks the strict
comparison in the Client::Sync::eds_event::testItems test.

Fixed by making the same change in the reference test data for Google
Calendar.

test/testcases/eds_event.ics.googlecalendar.tem.patch

@@ -94,7 +94,15 @@
  TRANSP:OPAQUE
  SEQUENCE:3
  SUMMARY:recurrence monthly\, 6th day\, limited
-@@ -97,11 +151,29 @@
+@@ -90,18 +144,36 @@
+ CLASS:PUBLIC
+ CREATED:20060416T203924Z
+ LAST-MODIFIED:20060416T203949Z
+-RRULE:FREQ=MONTHLY;INTERVAL=1;UNTIL=20060606T173000Z
++RRULE:BYMONTHDAY=6;FREQ=MONTHLY;INTERVAL=1;UNTIL=20060606T173000Z
+ END:VEVENT
+ END:VCALENDAR
+ 
  BEGIN:VCALENDAR
  PRODID:-//Ximian//NONSGML Evolution Calendar//EN
  VERSION:2.0