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

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https://hg.mozilla.org/integration/gaia-1_4/rev/e6822e6c9738
Author: Luke Chang <lchang@mozilla.com>
Desc: Revert "Merge pull request #18401 from luke-chang/987496_v1.3t_hindi_input_method"

This reverts commit 5587baf1eab05f5a9b3e5718cff719043b91a5bb.
Bumping manifests a=b2g-bump