Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/e6ba79372887
Author: autolander <bug.autolander@gmail.com>
Desc: Bug 1146804 - merge pull request #29087 from mnjul:bug_1146804_xml2dict_js to mozilla-b2g:master

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https://hg.mozilla.org/integration/gaia-central/rev/77c68197d728
Author: John Lu [:mnjul] <jlu@mozilla.com>
Desc: Bug 1146804 - Create file front-end for word_list_converter.js

xml2dict.js can now perform the function of xml2dict.py. It requires node.js (as does Gaia build environment), and xml2js npm package. Makefile has been modified accordingly and would target the xml2js dependency as a phony.

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https://hg.mozilla.org/integration/gaia-central/rev/6a7b28fe3417
Author: autolander <bug.autolander@gmail.com>
Desc: Bug 994357 - merge pull request #29243 from stasm:994357-reland to mozilla-b2g:master

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https://hg.mozilla.org/integration/gaia-central/rev/e987d3661dee
Author: Staś Małolepszy <stas@mozilla.com>
Desc: Bug 994357 - Use DOM overlays for safely setting node content. r=gandalf

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "36b6f9f824782457ae0674382604cb69d915dee4", 
+        "git_revision": "d08600b883589cfb556a7a3f39310b6b4e8106a0", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "6dfd7dd6e52ed167d48c82d4f37fd96e4c75b0e2", 
+    "revision": "e6ba793728875f04612bf287e03b4ec9a1614e59", 
     "repo_path": "integration/gaia-central"
 }