Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-2_0/rev/25d5f92a1868
Author: Zac <zcampbell@mozilla.com>
Desc: Bug 1043293 - Follow up with test changes to address non-functional Travis failures
Bumping manifests a=b2g-bump