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

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https://hg.mozilla.org/integration/gaia-central/rev/f8d94a375c28
Author: Yoshi Huang <allstars.chh@mozilla.com>
Desc: Merge pull request #17944 from allstarschh/Bug991585

Bug 991585 - NFC: NfcUtils.encodeHandoverSelect is not a function. r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/0a6bb56842cb
Author: allstars.chh <allstars.chh@gmail.com>
Desc: Bug 991585 - NFC: NfcUtils.encodeHandoverSelect is not a function. r=alive
Bumping manifests a=b2g-bump