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

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https://hg.mozilla.org/integration/gaia-central/rev/c36c2183f1df
Author: Etienne Segonzac <etienne@segonzac.info>
Desc: Merge pull request #19558 from etiennesegonzac/bug-1003165-homescreen-transition-reflows

Bug 1003165 - Prevent reflows when transitioning to and from the homescreen r=alive,kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/320f097fd74e
Author: Etienne Segonzac <etienne@segonzac.info>
Desc: Bug 1003165 - Prevent reflow when transitioning to and from the homescreen.
* Disabling edge zones without causing a reflow.
* Making sure the appWindow is never without a transform to prevent a reflow..
* Making sure all app windows have will-change set to prevent reflows when going into edge mode.
* Prevent the homesearch bar from causing a weird animation during the first transition back to homescreen before getting stuck with .transitioning = true.
* Removing the pointer-events:none during app transition.
Bumping manifests a=b2g-bump