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

========

https://hg.mozilla.org/integration/gaia-1_4/rev/1c98e08a2f1c
Author: Rudy Lu <me@rudy.lu>
Desc: Merge pull request #17737 from RudyLu/keyboard/Bug984328_master

Bug 984328 - [Keyboard][V1.3T] The alternative char menu cannot be
r=timdream(cherry picked from commit 4de40c81d8ee8a445c0634dd849c1c54009c7a97)
Bumping manifests a=b2g-bump