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

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https://hg.mozilla.org/integration/gaia-central/rev/6ff653f02cda
Author: gitmai <mri@tid.es>
Desc: Merge pull request #16136 from gitmai/bug-970320-CC-add-movistar-uruguay

Bug 970320 -[Cost Control] Add configuration to provide top-up & check b...
r=salva

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https://hg.mozilla.org/integration/gaia-central/rev/d2c555d85eeb
Author: mai <mri@tid.es>
Desc: Bug 970320 -[Cost Control] Add configuration to provide top-up & check balance in Movistar Uruguay
Bumping manifests a=b2g-bump