Bumping gaia.json for 2 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/287688e19d1a
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #10370 from mcirlanaru/bug_873409

Bug 873409 - [HotSpot] Truncate long SSID and password to avoid...

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https://hg.mozilla.org/integration/gaia-central/rev/785c44a65836
Author: Mihai Cirlanaru <mihai@cirlanaru.com>
Desc: Bug 873409 - [HotSpot] Truncate long SSID and password to avoid overlapping the text labels