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/0294418c0f8b
Author: John Ford <john@johnford.info>
Desc: Merge pull request #12245 from EverythingMe/bugfix-903405

[Bug 903405] [E.me][L10n] After changing language, the description in e.me should change [r=crdlc](cherry picked from commit b3d003e1c92f6bd685be275b57f17d186ffcaaa7)