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

========

https://hg.mozilla.org/integration/gaia-central/rev/e51159a1a86d
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Bug 1237618 - Disable apps/keyboard/test/marionette/uninstallation_test.js

========

https://hg.mozilla.org/integration/gaia-central/rev/8d4d8bfaefbd
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Bug 1235881 - Disable apps/system/test/marionette/browser_video_test.js

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "002fc618166f2887753b254a8b5e7d6195a86ed8", 
+        "git_revision": "62900f1e42d596c3faa2787a8bd18a8be034b558", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "e28121c9ef1e41e0dca9aacd92edfdbaf14ceb92", 
+    "revision": "e51159a1a86de1eb0e0dc2a3b84dfd03e8be8b8b", 
     "repo_path": "integration/gaia-central"
 }