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

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https://hg.mozilla.org/integration/gaia-central/rev/baff8d8901ce
Author: gitmai <mri@tid.es>
Desc: Merge pull request #24134 from empoalp/bug_1067859

Bug 1067859 - With an established call and calling to second phone numbe...

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https://hg.mozilla.org/integration/gaia-central/rev/017af820455c
Author: David Garcia <davidg@tid.es>
Desc: Bug 1067859 - With an established call and calling to second phone number the sound alert for new SMS does not beep
Bumping manifests a=b2g-bump