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

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https://hg.mozilla.org/integration/gaia-central/rev/c7b96cecf730
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #18356 from DimiL/bug_996633

Bug 996633 - {{ssid}} is displayed instead of the Wireless network name r=crh0716

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https://hg.mozilla.org/integration/gaia-central/rev/4020827e7d90
Author: dlee <dlee@mozilla.com>
Desc: Bug 996633 - {{ssid}} is displayed instead of the Wireless network name in settings app. r=arthur
Bumping manifests a=b2g-bump