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

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https://hg.mozilla.org/integration/gaia-central/rev/8e6c3e82c808
Author: Rudy Lu <me@rudy.lu>
Desc: Merge pull request #26476 from RudyLu/keyboard/Bug1091018-altMenu_for_secondLayout

Bug 1091018 - [flatfish][Ar][TCP][keyboard] missing letters.
r=timdream.

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https://hg.mozilla.org/integration/gaia-central/rev/28196b30eda5
Author: Rudy Lu <me@rudy.lu>
Desc: Bug 1091018 - [flatfish][Ar][TCP][keyboard] missing letters.
 - Don't hide key label in the alternative char menu.

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "4dbd4764b19d2754890f1d041555f6ceda48b2bb", 
+    "revision": "8e6c3e82c8086692cab272afece3f469e664d851", 
     "repo_path": "integration/gaia-central"
 }