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

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https://hg.mozilla.org/integration/gaia-central/rev/59d5a7c085bb
Author: Sherman Chen <shamenchens@users.noreply.github.com>
Desc: Merge pull request #26710 from shamenchens/Bug1110046-MenuGroupBackground

Bug 1110046 - Menu group should have transparent background color, r=johnhu

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https://hg.mozilla.org/integration/gaia-central/rev/3426a69fde38
Author: Sherman Chen <shamen.chens@gmail.com>
Desc: Bug 1110046 - Menu group should have transparent background color
Bumping manifests a=b2g-bump