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

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https://hg.mozilla.org/integration/gaia-central/rev/eb7cd305037c
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #19113 from bebef1987/dis_active_sync

Disable Bug 999447 - Active sync Inbox seems empty in the tests on Jenki...

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https://hg.mozilla.org/integration/gaia-central/rev/8176bd0d5700
Author: Bebe <bebe@mozilla.ro>
Desc: Disable Bug 999447 - Active sync Inbox seems empty in the tests on Jenkins

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https://hg.mozilla.org/integration/gaia-central/rev/6ddb371d0131
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #19071 from chirarobert/keyboard_layout

Bug 1007633 - Keyboard layout re-set in cleanup_gaia is incorrect

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https://hg.mozilla.org/integration/gaia-central/rev/c493b2a92a9d
Author: chirarobert <robert.chira@softvision.ro>
Desc: Bug 1007633 - Keyboard layout re-set in cleanup_gaia is incorrect

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "c02b4abbcc3cb342ff5869f70148206d9683b9b0", 
+    "revision": "eb7cd305037c4a2904cd9331e233edf272075cef", 
     "repo_path": "/integration/gaia-central"
 }