Bumping gaia.json for 2 gaia-1_3 revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_3/rev/9a98eda2d4fb
Author: Rex KM Lee <rexboy@mozilla.com>
Desc: Merge pull request #15188 from rexboy7/fix-bug934657-v1.3

bug 947956- [camera] Support camera.sensorAngle. r=djf

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https://hg.mozilla.org/integration/gaia-1_3/rev/3b6b528bdfa7
Author: Rex Lee <rexboy@mozilla.com>
Desc: bug 947956 - [camera] Support camera.sensorAngle and fix front-camera picture orientation