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

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https://hg.mozilla.org/integration/gaia-central/rev/e2bcecc1a778
Author: Carsten Book <tomcat@mozilla.com>
Desc: Merge pull request #19690 from tauzen/Bug1016377

Bug 1016377 - [NFC] NfcManager.handleTechnologyDiscovered should properly handle malformed messages, r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/26786a0063ae
Author: Krzysztof Mioduszewski <kmioduszewski@gmail.com>
Desc: Bug 1016377 - [NFC] NfcManager.handleTechnologyDiscovered should properly handle malformed messages
Bumping manifests a=b2g-bump