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

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https://hg.mozilla.org/integration/gaia-central/rev/96cfd90274a0
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #18595 from viorelaioia/bug_1000176_v1.5

Bug 1000176 - Investigate and fix failure in test_sms_with_attachments

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https://hg.mozilla.org/integration/gaia-central/rev/cadf4afc1ccb
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Bug 1000176 - Investigate and fix failure in test_sms_with_attachments

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "857c2c4405de73eec309da28025322225d360a17", 
+    "revision": "96cfd90274a05fd15708f2a27d9a503b9c1164d9", 
     "repo_path": "/integration/gaia-central"
 }