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

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https://hg.mozilla.org/integration/gaia-central/rev/38f46a9090e3
Author: gasolin <gasolin@gmail.com>
Desc: Merge pull request #22813 from gasolin/ftuhour12

when lauguage changed in ftu, update hour12 value, r=francisco

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https://hg.mozilla.org/integration/gaia-central/rev/4c8eb514c4ec
Author: gasolin <gasolin@gmail.com>
Desc: Bug 1053024 - when lauguage changed in ftu, update hour12 value
Bumping manifests a=b2g-bump