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

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https://hg.mozilla.org/integration/gaia-central/rev/fa38696a300f
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #25536 from crh0716/1089572

Bug 1089572 - Use consistent style of menu items and add highlight back r=eragonj

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https://hg.mozilla.org/integration/gaia-central/rev/af8cccf0b5c2
Author: Arthur Chen <crh0716@gmail.com>
Desc: Bug 1089572 - Use consistent style of menu items and add highlight back
Bumping manifests a=b2g-bump