Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_4/rev/5702ef83ebcc
Author: EragonJ <eragonj@eragonj.me>
Desc: Bug 974828 - [Settings][dsds] Outgoing data confirmation is wrong
Bumping manifests a=b2g-bump