Revert "g_file_set_contents(): don't fsync on ext3/4"

We didn't actually do any real-world testing of this, and
unsurprisingly it turns out to break in at least one widely-used
configuration (Fedora 19 x86_64, ext4 on LVM).

This reverts commit 9d0c17b50102267a5029b58b1f44efbad82d8f03.

https://bugzilla.gnome.org/show_bug.cgi?id=701560
Updated Serbian translation
Updated Brazilian Portuguese translation
Updated Indonesian translation
[l10n] Update Catalan translation
Updated German translation
Updated Marathi localization