Bumping gaia.json for 1 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/77058600c39f
Author: Corey Frang <gnarf37@gmail.com>
Desc: Bug 891908 - [MMS] Replacing an attachment with a large image should trigger resizing - r=schung

* Ensure that image resizing is triggered whenever an image is added (even via replace)
Bug 892497 - [contacts] the upgrade path is error-prone. r=bent
Backed out changeset d8a89848224b (bug 890928) for B2G mochitest-9 failures.