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

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https://hg.mozilla.org/integration/gaia-central/rev/32d698e600db
Author: Rex KM Lee <rexboy@mozilla.com>
Desc: Merge pull request #10594 from rexboy7/fix-bug877903-unittest

Bug 877903 - [system] Fix unit test regression for orientation observer

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https://hg.mozilla.org/integration/gaia-central/rev/66d473977a77
Author: Rex Lee <rexboy@mozilla.com>
Desc: Bug 877903 - [system] Unit test regression for orientation observer