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

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https://hg.mozilla.org/integration/gaia-central/rev/7faa7af5be1b
Author: Fabrice Desré <fabrice@desre.org>
Desc: Merge pull request #22338 from KevinGrandon/bug_1046254_prune_extra_elements

Bug 1046254 - [B2G][Homescreen] Unable to launch apps after moving them to the bottom row

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https://hg.mozilla.org/integration/gaia-central/rev/60916c66a389
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1046254 - [B2G][Homescreen] Unable to launch apps after moving them to the bottom row r=aus
Bumping manifests a=b2g-bump