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

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https://hg.mozilla.org/integration/gaia-central/rev/deddaf407510
Author: Marcus Cavanaugh <m@mcav.com>
Desc: Merge pull request #15194 from gnaneswar/Issue_951095

Bug 951095 - [Clock] Increase font-size of counting value in Stopwatch r=hhuang r=mcav

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https://hg.mozilla.org/integration/gaia-central/rev/e82ec09f39f4
Author: Gnaneswar Devuni <gnaneswar.devuni@accenture.com>
Desc: Bug 951095 - [Clock] Increase font-size of counting value in Stopwatch; r=reviews
Bumping manifests a=b2g-bump