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

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https://hg.mozilla.org/integration/gaia-central/rev/bde971ed4a86
Author: Arnau <arnau@arnaumarch.com>
Desc: Merge pull request #19552 from rnowm/1014521

Bug 1014521 - Add edit mode behavior to gaia-header r=wilsonpage

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https://hg.mozilla.org/integration/gaia-central/rev/02e6cbc335f0
Author: rnowm <arnau@arnaumarch.com>
Desc: Bug 1014521 - Add edit mode behavior to gaia-header
Bumping manifests a=b2g-bump