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

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https://hg.mozilla.org/integration/gaia-central/rev/5ca5ac2fe9b2
Author: Greg Weng <snowmantw@gmail.com>
Desc: Merge pull request #22870 from snowmantw/issue1035754

Bug 1035754 - [Gaia][lock screen] support 24 hour time format

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https://hg.mozilla.org/integration/gaia-central/rev/9b0e6e3bdd6f
Author: Greg Weng <snowmantw@gmail.com>
Desc: Bug 1035754 - [Gaia][lock screen] support 24 hour time format
Bumping manifests a=b2g-bump