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

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https://hg.mozilla.org/integration/gaia-central/rev/43a9a34d477e
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #20388 from KevinGrandon/bug_1023011_vertical_pressed_state

Bug 1023011 - (vertical-homescreen) Implement pressed state visual for App Icons

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https://hg.mozilla.org/integration/gaia-central/rev/c435cb940fc6
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1023011 - (vertical-homescreen) Implement pressed state visual for App Icons r=lightsofapollo
Bumping manifests a=b2g-bump