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

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https://hg.mozilla.org/integration/gaia-central/rev/caa72fd28c9f
Author: evanxd <itoyxd@gmail.com>
Desc: Merge pull request #16351 from gasolin/issue-971625

Bug 971625 - [settings] refactor marionette test for support panel

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https://hg.mozilla.org/integration/gaia-central/rev/960fd15e5e9c
Author: gasolin <gasolin@gmail.com>
Desc: Bug 971625 - [settings] refactor marionette test for support panel
Bumping manifests a=b2g-bump