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

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https://hg.mozilla.org/integration/gaia-central/rev/17a05516fd79
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #13182 from AlinT/bug_927126

Bug 927126 - Expand automated coverage around editing of gallery photos

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https://hg.mozilla.org/integration/gaia-central/rev/69059d6ff623
Author: AlinT <trifandreialin@gmail.com>
Desc: Bug 927126 - Expand automated coverage around editing of gallery photos