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

========

https://hg.mozilla.org/integration/gaia-central/rev/9af4d6e2fc7f
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #16756 from TheoChevalier/hud-l10n

Bug 978373 - [l10n][[Settings] Fix l10n for developer-hud

========

https://hg.mozilla.org/integration/gaia-central/rev/bf453132d7c5
Author: TheoChevalier <theo.chevalier11@gmail.com>
Desc: Bug 978373 - [l10n][[Settings] Fix l10n for developer-hud

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "branch": "", 
         "revision": ""
     }, 
-    "revision": "bb1141285ce72bbc5a672fd91381c463e1b5cc56", 
+    "revision": "9af4d6e2fc7f156b2c733e2678e373c6b8b484f9", 
     "repo_path": "/integration/gaia-central"
 }