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

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https://hg.mozilla.org/integration/gaia-central/rev/49747f365043
Author: Florin Strugariu <florin.strugariu@softvision.ro>
Desc: Merge pull request #25894 from viorelaioia/bug_1090281_1

Bug 1090281 - Investigate failure in test_setup_and_send_imap_email.py

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https://hg.mozilla.org/integration/gaia-central/rev/1153e3a9a97e
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Bug 1090281 - Investigate failure in test_setup_and_send_imap_email.py

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "7022736d7c1b7b83a20f55c05a262b9475fd114f", 
+    "revision": "49747f36504394d2654188eb755d2d385d84f4df", 
     "repo_path": "integration/gaia-central"
 }