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

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https://hg.mozilla.org/integration/gaia-central/rev/d42797d809a0
Author: Sean Lee <weilonge@gmail.com>
Desc: Merge pull request #26762 from weilonge/seanlee/STK/master/Bug1106956

Bug 1106956 - Remove Notifications from IDLE TEXT during starting gaia. r=frsela

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https://hg.mozilla.org/integration/gaia-central/rev/2c167e73f526
Author: Sean Lee <seanlee@Seans-MacBook-Pro.local>
Desc: Bug 1106956 - Remove Notifications from IDLE TEXT during starting gaia.
Bumping manifests a=b2g-bump