[evolution-data-server] New translatable string added

[Milan Crha <mcrha redhat com>]

        Hello,
I just committed a fix for bug [761450], where I added a new
translatable string:
   "Failed to login to the server: %s"
where the '%s' is replaced with the actual error message (as expected,
I suppose).
        Bye,
        Milan

[761450] https://bugzilla.gnome.org/show_bug.cgi?id=761450