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

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https://hg.mozilla.org/integration/gaia-central/rev/492a966d1206
Author: Zibi Braniecki <zibi@braniecki.net>
Desc: Merge pull request #34087 from zbraniecki/1250628-remove-l20n-reverse-proxy

Bug 1250628 - Remove the reverse proxy from l20n.js to l10n.js. r=stas

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https://hg.mozilla.org/integration/gaia-central/rev/c40a9261de01
Author: Zibi Braniecki <gandalf@mozilla.com>
Desc: Bug 1250628 - Remove the reverse proxy from l20n.js to l10n.js

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "8342cdd5bcacef45cc5b8896be2220427936dd40", 
+        "git_revision": "c274a004cc49d3e529e181adbe55171371cdabc9", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "6a40da327a15cbdc589e91fc98a2adf8f4c25a23", 
+    "revision": "492a966d1206b5740a0b09e708dbfb335d44b66c", 
     "repo_path": "integration/gaia-central"
 }