Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/eb8408898961
Author: Arnau <arnau@arnaumarch.com>
Desc: Merge pull request #19476 from pacorampas/replace-icons-1009464

Bug 1009464 - Replace outdated icons and add missing ones in Contacts.r=Jordano

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https://hg.mozilla.org/integration/gaia-central/rev/25efc3e63caa
Author: Paco Rampas <pacorampas@gmail.com>
Desc: Bug 1009464 - Replace outdated icons and add missing ones in Contacts.

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https://hg.mozilla.org/integration/gaia-central/rev/fd17172ad243
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Bug 995128 - Restore a CSS rule that was lost in the squashing

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "26fafc88225d29d47470dfcdd8451caafab00dad", 
+    "revision": "eb84088989614c989b7e89fafa10c586fe7d4eff", 
     "repo_path": "/integration/gaia-central"
 }