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

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https://hg.mozilla.org/integration/gaia-central/rev/3d056f6dc6be
Author: viorelaioia <viorelaioia@gmail.com>
Desc: Merge pull request #23460 from chirarobert/browser_sanity

Bug 1060242 - [v2.1] Remove test_browser_lan.py from sanity suite

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https://hg.mozilla.org/integration/gaia-central/rev/cf0d911c4806
Author: Robert Chira <robertchira@P5075.(none)>
Desc: Bug 1060242 - [v2.1] Remove test_browser_lan.py from sanity suite
Bumping manifests a=b2g-bump