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

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https://hg.mozilla.org/integration/gaia-central/rev/0d8cd2e99a86
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #21025 from zacc/bug_973302

Bug 973302

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https://hg.mozilla.org/integration/gaia-central/rev/bca0a09951ac
Author: Zac <zcampbell@mozilla.com>
Desc: Bug 973302 - Address intermittents in test_clock_* tests
Bumping manifests a=b2g-bump