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

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https://hg.mozilla.org/integration/gaia-central/rev/ab3086981caf
Author: Zibi Braniecki <zbigniew.braniecki@gmail.com>
Desc: Merge pull request #22804 from zbraniecki/1052861-speed-up-DOM-l10n-in-non-pretranslated-case

Bug 1052861 - Speed up DOM l10n in non-pretranslated case. r=me

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https://hg.mozilla.org/integration/gaia-central/rev/6c183f9794a1
Author: Zbigniew Braniecki <gandalf@mozilla.com>
Desc: Bug 1052861 - Speed up DOM l10n in non-pretranslated case

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "091d8adce0fd802f3a4ef5b2b67bff67dc882b44", 
+    "revision": "ab3086981caf359f5143e033dc7dc1ceeef7235a", 
     "repo_path": "/integration/gaia-central"
 }