Bumping gaia.json for 5 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/6c110da57ad3
Author: Hubert Figuière <hub@figuiere.net>
Desc: Merge pull request #23961 from hfiguiere/disc-numbers-list

Track sorting and listing improvements. (Bug 796305 and bug 841977) r=squib

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https://hg.mozilla.org/integration/gaia-central/rev/0dce4677485a
Author: Hubert Figuière <hub@figuiere.net>
Desc: Bug 796305 - Part 3: Marionette test for single disc

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https://hg.mozilla.org/integration/gaia-central/rev/30be40615f99
Author: Hubert Figuière <hub@figuiere.net>
Desc: Bug 841977 - Part 3: added marionette tests

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https://hg.mozilla.org/integration/gaia-central/rev/016054bbe144
Author: Hubert Figuière <hub@figuiere.net>
Desc: Bug 841977 - Part 2: Show track number instead of index. Also disc number if relevant.

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https://hg.mozilla.org/integration/gaia-central/rev/f900c62b3977
Author: Hubert Figuière <hub@figuiere.net>
Desc: Bug 796305 - Part 2: sort album sublist by track number.

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "711a0ac4cc4961473cfbd2495cd60f1ebfe58145", 
+    "revision": "6c110da57ad3d9df82d9da119ae6dac5020f79e6", 
     "repo_path": "/integration/gaia-central"
 }