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

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https://hg.mozilla.org/integration/gaia-central/rev/b133dff33401
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #25703 from bebef1987/rocket

Bug 1086563 - Write test to verify offline behaviour of the RocketBar

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https://hg.mozilla.org/integration/gaia-central/rev/5a635a8190d6
Author: Bebe <bebe@mozilla.ro>
Desc: Bug 1086563 - Write test to verify offline behaviour of the RocketBar
Bumping manifests a=b2g-bump