Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/5bc421b875ac
Author: Douglas Sherk <github@sherk.me>
Desc: Merge pull request #23395 from DouglasSherk/1059336-dialer-contacts-buttons-bindings

Bug 1059336 - Add bindings for contact buttons in the call information page. r=Rik, r=francisco

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https://hg.mozilla.org/integration/gaia-central/rev/3bb46d423da3
Author: Doug Sherk <github@sherk.me>
Desc: Bug 1059336 - Add bindings for contact buttons in the call information page. r=Rik

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https://hg.mozilla.org/integration/gaia-central/rev/4403803eb1f3
Author: Doug Sherk <github@sherk.me>
Desc: Bug 1059336 - Minor tweaks to shared contacts buttons code. r=francisco
Bumping manifests a=b2g-bump