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

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https://hg.mozilla.org/integration/gaia-central/rev/425f08bf04b0
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #13822 from askeing/940173

Bug 940173 - Unxfail test_ftu_skip_tour.py

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https://hg.mozilla.org/integration/gaia-central/rev/ed983d912a46
Author: askeing <askeing@gmail.com>
Desc: Bug 940173 - Unxfail test_ftu_skip_tour.py

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "266f48443f3ca832ed2508ec70bda792f594939d", 
+    "revision": "425f08bf04b0b9f038ae7374f29270077be86451", 
     "repo_path": "/integration/gaia-central"
 }