Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/9bf1b03cd152
Author: Sherman Chen <shamenchens@users.noreply.github.com>
Desc: Merge pull request #19590 from shamenchens/Bug1014531-FTULastScreen

Bug1014531 - Errors in FTE last screen after registering in FxA, r=fcampo, flod

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https://hg.mozilla.org/integration/gaia-central/rev/2f2b3f8566cd
Author: Sherman Chen <shamen.chens@gmail.com>
Desc: Bug1014531 - Errors in FTE last screen after registering in FxA

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https://hg.mozilla.org/integration/gaia-central/rev/b7c3a2626c21
Author: Gareth Aye <gaye@mozilla.com>
Desc: Merge pull request #19291 from gaye/bug-1010961-interop-tests

Bug 1010961 - Calendar interop tests r=me

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https://hg.mozilla.org/integration/gaia-central/rev/f8182bc058c9
Author: gaye <gaye@mozilla.com>
Desc: Bug 1010961 - Calendar interop tests
Bumping manifests a=b2g-bump