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

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https://hg.mozilla.org/integration/gaia-central/rev/df38eae57632
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #21088 from KevinGrandon/lightsofapollo-bug-1027935

Bug 1027935 - Correctly handle pending upgrades as well as pause/resume of upgrade downloads

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https://hg.mozilla.org/integration/gaia-central/rev/dd83cc593f5b
Author: James Lal <james@lightsofapollo.com>
Desc: Bug 1027935 - Correctly handle pending upgrades as well as pause/resume of
upgrade downloads r=kgrandon
Bumping manifests a=b2g-bump