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

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https://hg.mozilla.org/integration/gaia-central/rev/051e9f1823d1
Author: evelynhung <jj.evelyn@gmail.com>
Desc: Merge pull request #16239 from svic/Bug_972188

Bug 972188 - Don't call pair() for incoming file transfers, r=evelyn

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https://hg.mozilla.org/integration/gaia-central/rev/733b264118ec
Author: Arno Puder <arno@puder.org>
Desc: Bug 972188 - Don't call pair() for incoming file transfers
Bumping manifests a=b2g-bump