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

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https://hg.mozilla.org/integration/gaia-central/rev/f9e4703013b4
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: Merge pull request #20174 from eeejay/bug-1022024

Bug 1022024 - [Contacts] Fix accessibility roles in tag selector form control r=arcturus

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https://hg.mozilla.org/integration/gaia-central/rev/4e1575a98025
Author: Eitan Isaacson <eitan@monotonous.org>
Desc: Bug 1022024 - [Contacts] Fix accessibility roles in tag selector form control.
Bumping manifests a=b2g-bump