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

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https://hg.mozilla.org/integration/gaia-central/rev/b8ef9c2c975f
Author: viorelaioia <viorelaioia@gmail.com>
Desc: Merge pull request #22625 from chirarobert/fix_wifi_test

Bug 1050245 - [v2.1] fix test_connect_to_wifi_via_settings_app failure

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https://hg.mozilla.org/integration/gaia-central/rev/6abe41d2cfd1
Author: Robert Chira <robertchira@P5075.(none)>
Desc: Bug 1050245 - [v2.1] fix test_connect_to_wifi_via_settings_app failure
Bumping manifests a=b2g-bump