Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/6df2384e694d
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #23374 from etiennesegonzac/bug-1059108-webaudio-test-fail

Bug 1059108 - Use a MockAudioContext's in the AudioCompeting unit tests.

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https://hg.mozilla.org/integration/gaia-central/rev/389fa36261e6
Author: Etienne Segonzac <etienne@segonzac.info>
Desc: Bug 1059108 - Use a MockAudioContext's in the AudioCompeting unit tests.

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https://hg.mozilla.org/integration/gaia-central/rev/d6865dc53824
Author: EragonJ <eragonj@eragonj.me>
Desc: Merge pull request #23315 from EragonJ/bug-1058521

Bug 1058521 - [settings] move root panel screen lock item into panels/ro... r=Arthur, Zac

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https://hg.mozilla.org/integration/gaia-central/rev/07ffd7eb7023
Author: EragonJ <eragonj@eragonj.me>
Desc: Bug 1058521 - [settings] move root panel screen lock item into panels/root
Bumping manifests a=b2g-bump