Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/de3d3ac16def
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #20785 from AndreiH/bug_1028045

Bug 1028045 - [v2.1] Unxfail [test_ftu_skip_tour.py]

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https://hg.mozilla.org/integration/gaia-central/rev/b315a3bea335
Author: Andrei Hutusoru <andreihutusoru@P5069.(none)>
Desc: Bug 1028045 - [v2.1] Unxfail [test_ftu_skip_tour.py]

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "94001ec549fe8735b7c3d684b5cf51789865672d", 
+    "revision": "de3d3ac16defde70f1c5a949da50968fbfdb2962", 
     "repo_path": "/integration/gaia-central"
 }