Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-central/rev/b633ac1c4970
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #17188 from chirarobert/xfail_test_sms_to_dialer

Bug 983585 - Xfail test_sms_to_dialer with Bug 983070

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https://hg.mozilla.org/integration/gaia-central/rev/a1add141fba6
Author: chirarobert <robert.chira@softvision.ro>
Desc: Bug 983585 - Xfail test_sms_to_dialer with Bug 983070

========

https://hg.mozilla.org/integration/gaia-central/rev/fc8a1898b5d7
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #17187 from chirarobert/unxfail_keyboard_test

Bug 983584 - Unxfail test_email_keyboard because Bug 982113 was resolved

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https://hg.mozilla.org/integration/gaia-central/rev/2b49155925e4
Author: chirarobert <robert.chira@softvision.ro>
Desc: Bug 983584 - Unxfail test_email_keyboard because Bug 982113 was resolved

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "branch": "", 
         "revision": ""
     }, 
-    "revision": "a8df0c02a4d80afee512867de465f733cbe3763e", 
+    "revision": "b633ac1c4970651263c399dfbad7db86fda48ad9", 
     "repo_path": "/integration/gaia-central"
 }