[grilo-plugins] tracker: Populate track number metadata

[Xavier Claessens <xclaesse src gnome org>]

commit 927ab69baa8a9b93a4921c144e7e410d2222951d
Author: Xavier Claessens <xavier claessens collabora com>
Date:   Mon Aug 17 14:42:01 2015 -0400

    tracker: Populate track number metadata
    
    https://bugzilla.gnome.org/show_bug.cgi?id=753732

 src/tracker/grl-tracker-utils.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/src/tracker/grl-tracker-utils.c b/src/tracker/grl-tracker-utils.c
index b72a10b..3feeab7 100644
--- a/src/tracker/grl-tracker-utils.c
+++ b/src/tracker/grl-tracker-utils.c
@@ -353,6 +353,11 @@ grl_tracker_setup_key_mappings (void)
                         "upnp:thumbnail(?urn)",
                         "media");
   }
+
+  insert_key_mapping (GRL_METADATA_KEY_TRACK_NUMBER,
+                      "nmm:trackNumber",
+                      "nmm:trackNumber(?urn)",
+                      "audio");
 }
 
 tracker_grl_sparql_t *