Bumping gaia.json for 6 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/228e6da2c8b5
Author: Carsten Book <tomcat@mozilla.com>
Desc: Merge pull request #26181 from mancas/bug1100250

Bug 1100250 - [Follow-up] Keyboard is hidden when user try to write in a.... r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/fb4b75f9f28a
Author: mancas <manuel.casasbarrado@telefonica.com>
Desc: Bug 1100250 - [Follow-up] Keyboard is hidden when user try to write in a STK message or the device is locked.r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/1632d5c564f1
Author: Carsten Book <tomcat@mozilla.com>
Desc: Merge pull request #26147 from mancas/bug1097296

Bug 1097296 - [Window Management] Battery, Signal and time on the status.... r=etienne

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https://hg.mozilla.org/integration/gaia-central/rev/136656a1695f
Author: Manuel Casas <manuel.casasbarrado@telefonica.com>
Desc: Bug 1097296 - [Window Management] Battery, Signal and time on the status bar will appear behind download update overlay. r=etienne

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https://hg.mozilla.org/integration/gaia-central/rev/829337cc6011
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #26393 from crh0716/1102160

Bug 1102160 - Switch to use gaia header button r=eragonj

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https://hg.mozilla.org/integration/gaia-central/rev/4f699f5f2131
Author: Arthur Chen <crh0716@gmail.com>
Desc: Bug 1102160 - Switch to use gaia header button

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "ae606dcb11bde076bdfc07a9faf3f95982e46ba7", 
+    "revision": "228e6da2c8b5938075c97af8baa6ff5bd06134fd", 
     "repo_path": "integration/gaia-central"
 }