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

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https://hg.mozilla.org/integration/gaia-central/rev/c68e67d8dc1e
Author: Yuren Ju <yurenju@gmail.com>
Desc: Merge pull request #23298 from yurenju/log-settings

Bug 1022192 - Add more log for settings.js r=me

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https://hg.mozilla.org/integration/gaia-central/rev/09307bf8a995
Author: Yuren Ju <yurenju@gmail.com>
Desc: Bug 1022192 - Add more log for settings.js r=me
Bumping manifests a=b2g-bump