Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/a5c2e2bdbd7f
Author: Dale Harvey <dale@arandomurl.com>
Desc: Bug 1026269 - Encode search terms when constructing url. r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/3cc54a218f60
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Merge pull request #20728 from timdream/keyboard-update-l10nid

Bug 1025633 - Update l10n ID of keyboard aria labels, r=rudyl

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https://hg.mozilla.org/integration/gaia-central/rev/b464e37056cf
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Bug 1025633 - Update l10n ID of keyboard aria labels

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "97e61fd5898975f48162ac5a00dfdca745b354dd", 
+    "revision": "a5c2e2bdbd7f60637b74b862567eb298aaf80fb1", 
     "repo_path": "/integration/gaia-central"
 }