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

========

https://hg.mozilla.org/integration/gaia-central/rev/1ee8f4c86de4
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #16024 from jmcanterafonseca/fb_sync_fixed

Bug 952691 - [B2G][Contacts][Facebook Sync]Contacts imported from Facebo...

========

https://hg.mozilla.org/integration/gaia-central/rev/543c71092e7d
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 952691 - [B2G][Contacts][Facebook Sync]Contacts imported from Facebook do not sync every 24 hours to reflect profile changes.

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "c2c906ac532794ddf56e5ada6441e322fa6069ef", 
+    "revision": "1ee8f4c86de4920d58694950983b16f2aad6d3a7", 
     "repo_path": "/integration/gaia-central"
 }