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

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https://hg.mozilla.org/integration/gaia-central/rev/3a9c5152b8c7
Author: Alive.Kuo <alegnadise@gmail.com>
Desc: Merge pull request #25577 from alivedise/bugzilla/1090163/core-instantiation-support

Bug 1090163 - Support normal stage 1 instantiation in core, r=timdream

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https://hg.mozilla.org/integration/gaia-central/rev/e4e62194528d
Author: Alive Kuo <alegnadise@gmail.com>
Desc: Bug 1090163 - Support normal stage 1 instantiation in core

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "0cc4be3cd3cda489342409b919cd5c0d45e83f39", 
+    "revision": "3a9c5152b8c731c9f84c7716f19180eca8c0d607", 
     "repo_path": "/integration/gaia-central"
 }