Bumping gaia.json for 2 gaia-central revision(s) a=gaia-bump
Truncated some number of revisions since the previous bump.

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https://hg.mozilla.org/integration/gaia-central/rev/7aec9fba1c70
Author: Eitan Isaacson <eitan@monotonous.org>
Desc: Merge pull request #13490 from eeejay/bug-936213

Bug 936213 - [homescreen] Remove aria-hidden attribute from dock pages.

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https://hg.mozilla.org/integration/gaia-central/rev/0bb8d2a463ff
Author: Eitan Isaacson <eitan@monotonous.org>
Desc: Bug 936213 - [homescreen] Remove aria-hidden attribute from dock pages.