Bumping gaia.json for 2 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/88cc9854d6da
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Merge pull request #13538 from davidflanagan/demokbd

demo keyboard app, NPOTB

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https://hg.mozilla.org/integration/gaia-central/rev/cb18ccb6a653
Author: David Flanagan <dflanagan@mozilla.com>
Desc: demo keyboard app with dynamic hit target resizing

make shift and ?123 keys work

defined controller and hit detector classes

get key alternatives menu working

define a layout as a set of pages

add dynamic hit target resizing

visual tweaks

fix build-time configuration bug

remove visual indication of dynamic resizing

use <template> elements to define basic keyboard elements

Allow Backspace, Return, etc to be static

Use textBeforeCursor for next character prediction; fix minor bugs

add autocorrect dictionary