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

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https://hg.mozilla.org/integration/gaia-2_1/rev/182736889e2d
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Revert "Merge pull request #24650 from shamenchens/Bug1074166-L10NBasedir"

This reverts commit 7ef2e1e59637a34ca4489c329b3bdee93df3ac6c, reversing
changes made to d71f8804d7229f4b354259d5d8543c25b4796064.
Bumping manifests a=b2g-bump