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

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https://hg.mozilla.org/integration/gaia-central/rev/a54e097e9e33
Author: Arnau <arnau@arnaumarch.com>
Desc: Merge pull request #18288 from rnowm/995984

Bug 995984 - [Contacts] input type date is not using the right style r=arcturus

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https://hg.mozilla.org/integration/gaia-central/rev/417dacfcac74
Author: rnowm <arnau@arnaumarch.com>
Desc: Bug 995984 - [Contacts] input type date is not using the right style
Bumping manifests a=b2g-bump