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

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https://hg.mozilla.org/integration/gaia-central/rev/96967373949b
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #16387 from rnowm/973648

Bug 973648 - in the input area BB allow to create a reset button by style

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https://hg.mozilla.org/integration/gaia-central/rev/be12b51d8a38
Author: rnowm <arnau@arnaumarch.com>
Desc: Bug 973648 - in the input area BB allow to create a reset button by style
Bumping manifests a=b2g-bump