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

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https://hg.mozilla.org/integration/gaia-2_0/rev/e0c1abce5943
Author: Russ Nicoletti <rnicoletti@mozilla.com>
Desc: Bug 1025147 - [B2G][Video]The slider overlaps the video time length when the playback ends
Bumping manifests a=b2g-bump