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

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https://hg.mozilla.org/integration/gaia-central/rev/e52913fdf478
Author: Ben Francis <ben@tola.me.uk>
Desc: Merge pull request #22916 from KevinGrandon/bug_1053976_fix_eme_search

Bug 1053976 - [B2G][E.me] Searching 'Social' does not display E.me apps r=benfrancis

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https://hg.mozilla.org/integration/gaia-central/rev/6cb00cfbc4bf
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1053976 - [B2G][E.me] Searching 'Social' does not display E.me apps

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "87505dbb861f8c1e5437bcf92cc5a0040e6fdf3f", 
+    "revision": "e52913fdf478f709cc704871dfe4b1e10173ca8c", 
     "repo_path": "/integration/gaia-central"
 }