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

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https://hg.mozilla.org/integration/gaia-central/rev/ed6276f6c113
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #23509 from KevinGrandon/bug_1041372_reland

Bug 1041372 - [User Story] Rocketbar behavior for fullscreen apps with navigation chrome

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https://hg.mozilla.org/integration/gaia-central/rev/02a1aa4fe158
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1041372 - [User Story] Rocketbar behavior for fullscreen apps with navigation chrome r=vingtetun
Bumping manifests a=b2g-bump