Bumping gaia.json for 1 gaia-1_2 revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_2/rev/95fead78dd5c
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Revert "Revert "Merge pull request #12892 from comoyo/value_selector_inputcontext""

This reverts commit 276838e60f34b3ec251fe7e39d6b7ae2935144f1.