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

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https://hg.mozilla.org/integration/gaia-central/rev/6cea8070de7b
Author: Albert <acperez@tid.es>
Desc: Merge pull request #18417 from acperez/bug-995900

Bug 995900 - build process for operatorvariant app

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https://hg.mozilla.org/integration/gaia-central/rev/63c31d6e44c8
Author: Albert <acperez@tid.es>
Desc: Bug 995900 - build process for operatorvariant app

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "cf7eee4318e4fc1846e851c620e3007c78de092a", 
+    "revision": "6cea8070de7b0124c7c490d4e8f6a9dcc7bb6a13", 
     "repo_path": "/integration/gaia-central"
 }