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

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https://hg.mozilla.org/integration/gaia-central/rev/8d036be6b988
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Merge pull request #23472 from wilsonpage/1060295

Bug 1060295 - Remove stray .only r=Rik

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https://hg.mozilla.org/integration/gaia-central/rev/d4912b8ae4de
Author: Wilson Page <wilsonpage@me.com>
Desc: Bug 1060295 - Remove stray .only
Bumping manifests a=b2g-bump