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

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https://hg.mozilla.org/integration/gaia-central/rev/a6daf6b427d8
Author: russnicoletti <rnicoletti@mozilla.com>
Desc: Merge pull request #17215 from russnicoletti/bug982743

Bug 982743 - [B2G][Clock]Timer section's Resume button illuminates and doesn't resume timer countdown r=mcav

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https://hg.mozilla.org/integration/gaia-central/rev/b583b37dab27
Author: Russ Nicoletti <rnicoletti@mozilla.com>
Desc: Bug 982743 - [B2G][Clock]Timer section's Resume button illuminates and doesn't resume timer countdown
Bumping manifests a=b2g-bump