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

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https://hg.mozilla.org/integration/gaia-central/rev/2e1e72454fc4
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #25275 from KevinGrandon/reland_bug_1082911

Bug 1082911 - Adding integration tests for SHB homescreen

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https://hg.mozilla.org/integration/gaia-central/rev/a3a8d3a9fef8
Author: albertopq <apastor@mozilla.com>
Desc: Bug 1082911 - Adding integration tests for SHB homescreen

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "b743db091d25a29777acb9a94ed8ac27b7b5cb60", 
+    "revision": "2e1e72454fc457a41409ebf41fe3e8b09cc9a8cd", 
     "repo_path": "/integration/gaia-central"
 }