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

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https://hg.mozilla.org/integration/gaia-central/rev/3ac6254190aa
Author: EragonJ <eragonj@eragonj.me>
Desc: Merge pull request #24600 from EragonJ/bug-1075303

Bug 1075303 - [settings] remove security_privacy.js

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https://hg.mozilla.org/integration/gaia-central/rev/e9677a1f499c
Author: EragonJ <eragonj@eragonj.me>
Desc: Bug 1075303 - [settings] remove security_privacy.js
Bumping manifests a=b2g-bump