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

========

https://hg.mozilla.org/integration/gaia-1_3/rev/c54f555bdb8d
Author: Dominic Kuo <dkuo@mozilla.com>
Desc: Merge pull request #17231 from dominickuo/v1.3-bug-958470-new

Bug 958470 - [Ringtones] set ringer type to the ringtones player, r=jimporter

========

https://hg.mozilla.org/integration/gaia-1_3/rev/121482f9473e
Author: Dominic Kuo <dkuo@mozilla.com>
Desc: Bug 958470 - [Ringtones] set ringer type to the ringtones player
Bumping manifests a=b2g-bump