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

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https://hg.mozilla.org/integration/gaia-central/rev/4836ca6b14f0
Author: chirarobert <robert.chira@softvision.ro>
Desc: Merge pull request #24300 from bebef1987/skip_ftu

Bug 1071089 - Skip test_ftu_with_tour because of Bug 1065933

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https://hg.mozilla.org/integration/gaia-central/rev/d210619008be
Author: Bebe <bebe@mozilla.ro>
Desc: Bug 1071089 - Skip test_ftu_with_tour because of Bug 1065933
Bumping manifests a=b2g-bump