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

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https://hg.mozilla.org/integration/gaia-central/rev/ed6e4ef9cace
Author: gasolin <gasolin@gmail.com>
Desc: Merge pull request #24253 from gasolin/issue-1068030

Bug 1068030 - Time format is not set to a proper default locale value, r=sfoster

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https://hg.mozilla.org/integration/gaia-central/rev/552eb6d82422
Author: gasolin <gasolin@gmail.com>
Desc: Bug 1068030 - Time format is not set to a proper default locale value
Bumping manifests a=b2g-bump