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

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https://hg.mozilla.org/integration/gaia-central/rev/796c131d4afe
Author: Dave Hylands <dhylands@gmail.com>
Desc: Merge pull request #24908 from dhylands/ds-listener

Bug 1072535 - Change ds-test to listen to all storage types. r=dhylands

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https://hg.mozilla.org/integration/gaia-central/rev/65d2a113d80d
Author: Dave Hylands <dhylands@gmail.com>
Desc: Bug 1072535 - Change ds-test to listen to all storage types. r=dhylands
Bumping manifests a=b2g-bump