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

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https://hg.mozilla.org/integration/gaia-central/rev/8a322556bd47
Author: AndreiH <andrei.hutusoru@softvision.ro>
Desc: Merge pull request #19553 from viorelaioia/bug-1008909

Bug 1008909 - Refactor test_inter_app_comm

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https://hg.mozilla.org/integration/gaia-central/rev/51fefd73de3e
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Bug 1008909 - Refactor test_inter_app_comm

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "f4f2214a54a728b5e727a6d49d216fa7b1e0f713", 
+    "revision": "8a322556bd47d1d937180c8cf1b0aac03b7b367c", 
     "repo_path": "/integration/gaia-central"
 }