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

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https://hg.mozilla.org/integration/gaia-central/rev/34a08b646a18
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #20513 from lightsofapollo/landscape-bugs

Bug 1024947 - Lock search app orientation

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https://hg.mozilla.org/integration/gaia-central/rev/52fc673eb29a
Author: James Lal <james@lightsofapollo.com>
Desc: Bug 1024947 - Lock search app orientation
Bumping manifests a=b2g-bump