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

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https://hg.mozilla.org/integration/gaia-central/rev/981ac1f952cf
Author: Fernando Campo <fernando.campo@telefonica.com>
Desc: Merge pull request #17896 from fcampo/split-fte-comms-990002

Bug 990002 - Move import utilities to shared folder (r=jmcf,arcturus, etienne)

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https://hg.mozilla.org/integration/gaia-central/rev/36e00eb7acb0
Author: Fernando Campo <fernando.campo@telefonica.com>
Desc: Bug 990002 - Move import utilities to shared folder

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "1d85e76d19ed6e3ae1d0745b8e04e0ad513801fe", 
+    "revision": "981ac1f952cf91b876b95a26aab05ee144f2e97d", 
     "repo_path": "/integration/gaia-central"
 }