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

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https://hg.mozilla.org/integration/gaia-central/rev/b108571404b1
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #14104 from askeing/943757

Bug 943757 - Fix test_sms_contact.TestContacts

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https://hg.mozilla.org/integration/gaia-central/rev/40600d04b374
Author: askeing <askeing@gmail.com>
Desc: Bug 943757 - Fix test_sms_contact.TestContacts

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "542b91f91ac45b32196523877f8512aa8dfa909c", 
+    "revision": "b108571404b1cb30c78e3496ebc0266877bae664", 
     "repo_path": "/integration/gaia-central"
 }