Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/587d98bf2662
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Revert "Merge pull request #26192 from jmcanterafonseca/fix_del_button"

This reverts commit 6f6e4b9b395b95dd920ee701d0c5ec6aa2c1d805, reversing
changes made to f004f8c891c4a6510a4679f3804ba3123af26615.
Bumping manifests a=b2g-bump