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

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https://hg.mozilla.org/integration/gaia-2_0/rev/d4f469351682
Author: Salvador de la Puente González <salva@unoyunodiez.com>
Desc: Merge pull request #22998 from lodr/bug-1043662-missing-labels

Bug 1043662 - [Flame] Missing labels in Firefox Ringtones and Alerts
r=yurenju

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https://hg.mozilla.org/integration/gaia-2_0/rev/5c44938b67ce
Author: Salvador de la Puente <salva@unoyunodiez.com>
Desc: Bug 1043662 - [Flame] Missing labels in Firefox Ringtones and Alerts
Bumping manifests a=b2g-bump