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

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https://hg.mozilla.org/integration/gaia-central/rev/7e70d8cbb8b0
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Merge pull request #22925 from pivanov/bug-1053418

Bug 1053418 - typos in shared/style/icons/icons.html and shared/style/icons/selection.json

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https://hg.mozilla.org/integration/gaia-central/rev/cb72f27db413
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Bug 1053418 - typos in shared/style/icons/icons.html and shared/style/icons/selection.json r=pivanov
Bumping manifests a=b2g-bump