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

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https://hg.mozilla.org/integration/gaia-central/rev/cb4e32c6e188
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Merge pull request #19366 from pivanov/bug-1008121

Bug 1008121 - [VDR][Calendarl] Apply Buttons [BB]

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https://hg.mozilla.org/integration/gaia-central/rev/94b7992d4218
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Bug 1008121 - [VDR][Calendarl] Apply Buttons [BB]
Bumping manifests a=b2g-bump