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

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https://hg.mozilla.org/integration/gaia-central/rev/89e8095a1515
Author: Wilson Page <wilsonpage@me.com>
Desc: Merge pull request #18858 from wilsonpage/1004420

Bug 1004420 - Spinner over camera preview

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https://hg.mozilla.org/integration/gaia-central/rev/df0b0a93468b
Author: Wilson Page <wilsonpage@me.com>
Desc: Bug 1004420 - Spinner over camera preview

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "a67e099458fd785b9de0dfc645d48ee727701ecd", 
+    "revision": "89e8095a1515d9ff7671400baa0a6a50161394ba", 
     "repo_path": "/integration/gaia-central"
 }