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

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https://hg.mozilla.org/integration/gaia-central/rev/e704a7447a7f
Author: autolander <bug.autolander@gmail.com>
Desc: Bug 1102319 - merge pull request #27055 from anefzaoui:bug-1102319 to mozilla-b2g:master

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https://hg.mozilla.org/integration/gaia-central/rev/5fef55255bc6
Author: Ahmed Nefzaoui <nefzaoui.ahmed@hotmail.com>
Desc: Bug 1102319 - Keypad solid-colored buttons are bunched up too much

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "f34af4cf05ef953b87b8fd28e80d3ec254db0755", 
+    "revision": "e704a7447a7fce238197a7f5429b2282090f1d13", 
     "repo_path": "integration/gaia-central"
 }