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

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https://hg.mozilla.org/integration/gaia-central/rev/5e7993f00854
Author: George <georgeiscoming@gmail.com>
Desc: Merge pull request #21743 from cctuan/1036788

Bug 1036788 - Stop using origins to identify apps

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https://hg.mozilla.org/integration/gaia-central/rev/f760fd75ec06
Author: cctuan <georgeiscoming@gmail.com>
Desc: Bug 1036788 - Stop using origins to identify apps
Bumping manifests a=b2g-bump