Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/67031412e37f
Author: Etienne Segonzac <etienne@segonzac.info>
Desc: Merge pull request #17498 from KDDI-tech/Bug889830

Bug 889830 - JavascriptException: TypeError: result[i].type r=etienne

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https://hg.mozilla.org/integration/gaia-central/rev/6445afea6494
Author: YusukeYamamoto <yu-yamamoto@kddi-tech.com>
Desc: Bug 889830 - JavascriptException: TypeError: result[i].type r=etienne

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https://hg.mozilla.org/integration/gaia-central/rev/879cecbaa331
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Revert "Bug 937442 - (lockscreen-window) [Window Management] Implement LockscreenWindow to manage LockScreen"

This reverts commit 2b0301ae10f7ff15dda86625191a8690725c6daf.
Bumping manifests a=b2g-bump