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

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https://hg.mozilla.org/integration/gaia-central/rev/1c2a8d1bf77b
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #25182 from zacc/bug_1083169

Bug 1083169 - Increase gaiatest start_b2g timeout so it can run on debug...

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https://hg.mozilla.org/integration/gaia-central/rev/ef36841e9dd1
Author: Zac <zcampbell@mozilla.com>
Desc: Bug 1083169 - Increase gaiatest start_b2g timeout so it can run on debug b2g builds r=dhunt
Bumping manifests a=b2g-bump