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

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https://hg.mozilla.org/integration/gaia-central/rev/886b2949b391
Author: Gareth Aye <gaye@mozilla.com>
Desc: Merge pull request #23492 from gaye/bug-1060447

Disable week_view_test.js on tbpl

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https://hg.mozilla.org/integration/gaia-central/rev/d0e4c000c778
Author: gaye <gaye@mozilla.com>
Desc: Disable week_view_test.js on tbpl
Bumping manifests a=b2g-bump