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

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https://hg.mozilla.org/integration/gaia-central/rev/549188baa8fe
Author: Albert <alberto.crespellperez@telefonica.com>
Desc: Merge pull request #24877 from acperez/bug-1067296-v2

Bug 1067296 - Modify style and locales of finish popup. r=gsvelto

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https://hg.mozilla.org/integration/gaia-central/rev/2f87afe8e2b2
Author: Albert <alberto.crespellperez@telefonica.com>
Desc: Bug 1067296 - Modify style and locales of finish popup. r=gsvelto
Bumping manifests a=b2g-bump