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

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https://hg.mozilla.org/integration/gaia-central/rev/200422910918
Author: Miller Medeiros <miller@millermedeiros.com>
Desc: Merge pull request #18847 from millermedeiros/951075-day-view-visual-refresh

Bug 951075 - [Calendar] Day View_1.4 Visual Refresh r=gaye

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https://hg.mozilla.org/integration/gaia-central/rev/43e7c7d69fd9
Author: Miller Medeiros <miller@millermedeiros.com>
Desc: Bug 951075 - [Calendar] Day View_1.4 Visual Refresh
Bumping manifests a=b2g-bump