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

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https://hg.mozilla.org/integration/gaia-central/rev/f557731102da
Author: Julien Wajsberg <felash@gmail.com>
Desc: Revert "Bug 1043293 - [Verticalhome] use "touchend" instead of "click" to launch applications r=crdlc"

This reverts commit 82654e607a579374052124499d40135868da9a72.

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https://hg.mozilla.org/integration/gaia-central/rev/5b5122a45b39
Author: Julien Wajsberg <felash@gmail.com>
Desc: Bug 1043293 - [Verticalhome] use "touchend" instead of "click" to launch applications r=crdlc
Bumping manifests a=b2g-bump