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

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https://hg.mozilla.org/integration/gaia-central/rev/43971acc7ff9
Author: russnicoletti <rnicoletti@mozilla.com>
Desc: Merge pull request #20945 from russnicoletti/bug-1028835

Bug 1028835 - [dolphin][flame] video list display abnormal for a while while r=johu

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https://hg.mozilla.org/integration/gaia-central/rev/616476c35348
Author: Russ Nicoletti <rnicoletti@mozilla.com>
Desc: Bug 1028835 - [dolphin][flame] video list display abnormal for a while when switch between landscape mode and portrait mode
Bumping manifests a=b2g-bump