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

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https://hg.mozilla.org/integration/gaia-2_0/rev/cb521d5566e2
Author: chirarobert <robert.chira@softvision.ro>
Desc: Merge pull request #22406 from viorelaioia/bug_1046131

Bug 1046131 - [v2.0] Investigate intermittent failure in test_cost_contr...

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https://hg.mozilla.org/integration/gaia-2_0/rev/b07b55ec1d20
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Bug 1046131 - [v2.0] Investigate intermittent failure in test_cost_control_reset_wifi.py
Bumping manifests a=b2g-bump