Found during git clean -dfx

Instead of using imported code that's not changed in half a decade, let's use
the external maintained version packaged up.

Previously it took void and it was changed to take a GFile.

https://bugzilla.gnome.org/show_bug.cgi?id=737243
(cherry picked from commit 8c6485a3)

This reverts commit 6b2dff6e.

We want to avoid data loss until AFTER we have Philip's branch to cope with
this ontology change. This commit will exist in master and 1.4 only.

Philip's branch:

https://git.gnome.org/browse/tracker/log/?h=maxcardinality-change-support

Always wait for send_query to finish. In case of any exceptions from
splice_async we can not leave it hanging.

https://bugzilla.gnome.org/show_bug.cgi?id=737023

https://bugzilla.gnome.org/show_bug.cgi?id=737023

Signed-off-by: Dominique Leuenberger <dimstar@opensuse.org>

https://bugzilla.gnome.org/show_bug.cgi?id=736328

https://bugzilla.gnome.org/show_bug.cgi?id=735180

You don't want to use the example text for gnome-power-manager...

Follow up 354fc70f

This patch does the following things:
- The _NO_STAT flag has been added.
- The _FOLLOW_SYMLINKS flag has been added in the follow-symlinks branch and
  is not intended for this development cycle
- Remove TrackerDataProvider's _{get|set}_dir_flags() API (no longer used).