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

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https://hg.mozilla.org/integration/gaia-central/rev/30b018d94ee9
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #17121 from jmcanterafonseca/fix_bday_date

Bug 980650 - Contact birthday is always off by 1

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https://hg.mozilla.org/integration/gaia-central/rev/04dbe759564c
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 980650 - Contact birthday is always off by 1
Bumping manifests a=b2g-bump