bug#15933: make check not working

[Eli Zaretskii]

> Date: Thu, 28 Nov 2013 22:28:24 +0200
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 15933@debbugs.gnu.org
> 
> > Date: Thu, 28 Nov 2013 21:46:21 +0200
> > From: Eli Zaretskii <eliz@gnu.org>
> > Cc: 15933@debbugs.gnu.org
> > 
> > There are still a few (6 on one machine, 3 on another) tests that fail
> > on Windows, but there are no more crashes.
> 
> Actually, all but 2 of these failures happen on GNU/Linux as well, so
> that's not a Windows-specific issue.
> 
> The 2 that fail only on Windows are almost certainly problems with the
> test setup and/or data, I will take a look soon.

Actually, 3 of the failures seem to be Windows-specific.  I fixed 2 of
them; the 3rd one, in icalendar-tests.el, seems to be something about
time-zone data in icalendar events, which is beyond my pay-grade.