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

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https://hg.mozilla.org/integration/gaia-central/rev/01c20b272cd5
Author: Sherman Chen <shamenchens@users.noreply.github.com>
Desc: Merge pull request #18935 from shamenchens/Bug1003772-Wallpaper-2

Bug 1003772 Move distribution_tablet/wallpapers to apps/wallpapers/build/tablet, r=yurenju

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https://hg.mozilla.org/integration/gaia-central/rev/94dbd33bd0c2
Author: Sherman Chen <shamen.chens@gmail.com>
Desc: Bug 1003772 Move distribution_tablet/wallpapers to apps/wallpapers/build/tablet/
Bumping manifests a=b2g-bump