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

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https://hg.mozilla.org/integration/gaia-central/rev/d2b6a40c0cad
Author: Evyatar Amitay <evyatron@gmail.com>
Desc: Merge pull request #12701 from EverythingMe/924053-collection-edit-remove

[Bug 924053] Disable app click when in edit mode [r=amirn]

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https://hg.mozilla.org/integration/gaia-central/rev/d39f164f4a7a
Author: Evyatar Amitay <evyatron@gmail.com>
Desc: [Bug 924053] Disable app click when in edit mode [r=amirn]