Bumping gaia.json for 2 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/ab2285ccc529
Author: Ben Kelly <bkelly@mozilla.com>
Desc: Merge pull request #11051 from wanderview/contacts-sort-case

Bug 895149: case-insensitive sort for new contacts.  r=arcturus

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https://hg.mozilla.org/integration/gaia-central/rev/5a6dc632a05f
Author: Ben Kelly <ben@wanderview.com>
Desc: Bug 895149: case-insensitive sort for new contacts