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

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https://hg.mozilla.org/integration/gaia-central/rev/1c2414eb1285
Author: Yura Zenevich <yura.zenevich@gmail.com>
Desc: Merge pull request #23501 from yzen/bug-1038698

Bug 1038698 - only start running system a11y visibility tests when the l...

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https://hg.mozilla.org/integration/gaia-central/rev/da04456642c1
Author: Yura Zenevich <yzenevich@mozilla.com>
Desc: Bug 1038698 - only start running system a11y visibility tests when the logo is completely hidden.
Bumping manifests a=b2g-bump