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

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https://hg.mozilla.org/integration/gaia-central/rev/0b8bfc8b60c8
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #16900 from zacc/bug_979248

Bug 979248 - Fix default timeout in start_b2g method

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https://hg.mozilla.org/integration/gaia-central/rev/a08937c7a1d5
Author: Zac Campbell <zcampbell@mozilla.com>
Desc: Bug 979248 - Fix default timeout in start_b2g method
Bumping manifests a=b2g-bump