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

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https://hg.mozilla.org/integration/gaia-central/rev/c6aeaa41977d
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #14750 from jmcanterafonseca/fix_export_alpha_scroll

Bug 951107 - alpha scroll in export contacts screen is broken

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https://hg.mozilla.org/integration/gaia-central/rev/89986d9dfd30
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 951107 - alpha scroll in export contacts screen is broken

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "3468c6bb02a76b587e37958e580d3789a0b26989", 
+    "revision": "c6aeaa41977d9410b9baac23ccea6909f796fd1f", 
     "repo_path": "/integration/gaia-central"
 }