Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_3/rev/9455662fc49f
Author: Jim Porter <squibblyflabbetydoo@gmail.com>
Desc: Merge pull request #16496 from jimporter/ringtone-pick

Bug 953093 - [Fugu][File upload selector] Choosing the system ringtones will go back to the webpage; r=djf
(cherry picked from commit 043b24fbe6f79bc3c0785717a8143eb27833f721)
Bumping manifests a=b2g-bump