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

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https://hg.mozilla.org/integration/gaia-central/rev/e99888b85a6b
Author: evanxd <itoyxd@gmail.com>
Desc: Merge pull request #19686 from millermedeiros/1016320-calendar-color

Bug 1016320 - [Calendar] remove any reference to old .calendar-color class r=evanxd

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https://hg.mozilla.org/integration/gaia-central/rev/511dabc5d659
Author: Miller Medeiros <miller@millermedeiros.com>
Desc: Bug 1016320 - [Calendar] remove any reference to old .calendar-color class
Bumping manifests a=b2g-bump