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

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https://hg.mozilla.org/integration/gaia-central/rev/345f69046067
Author: George <georgeiscoming@gmail.com>
Desc: Merge pull request #14641 from cctuan/949966

Bug 949966 - [Gallery] empty message of delete dialog

========

https://hg.mozilla.org/integration/gaia-central/rev/dad53410a020
Author: cctuan <georgeiscoming@gmail.com>
Desc: Bug 949966 - [Gallery] empty message of delete dialog

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "054b7aea884b244d9d6303e8b7361104734d631c", 
+    "revision": "345f6904606712c9029d13a19bb59f93616aa18d", 
     "repo_path": "/integration/gaia-central"
 }