Bumping gaia.json for 2 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/8bf02cab2565
Author: James Lal <james@lightsofapollo.com>
Desc: Merge pull request #12222 from gaye/unlock-marionette-version

Revert "Merge pull request #12221 from lightsofapollo/marionette-fix-state

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https://hg.mozilla.org/integration/gaia-central/rev/5e41017959f0
Author: gaye <gaye@mozilla.com>
Desc: Revert "Merge pull request #12221 from lightsofapollo/marionette-fix-state"

This reverts commit 3f51f302c3a0c57d8bad482ec7ee86b2819389fb, reversing
changes made to 7596b8368097c3d5bd4c5fafd553dc6bfc2e3520.

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "092d3aabd1ec799c748809a484009f0bdde8c51f", 
+    "revision": "8bf02cab25657237fdd069ffe083c7960f45d04a", 
     "repo_path": "/integration/gaia-central"
 }