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

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https://hg.mozilla.org/integration/gaia-central/rev/4235e9c7c548
Author: Greg Weng <snowmantw@gmail.com>
Desc: Merge pull request #26760 from snowmantw/bug1110960

Bug 1110960 - Device slowing down after more than one day of uptime

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https://hg.mozilla.org/integration/gaia-central/rev/2f29ae88d423
Author: Greg Weng <snowmantw@gmail.com>
Desc: Bug 1110960 - Device slowing down after more than one day of uptime
Bumping manifests a=b2g-bump