Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/c3b71e7993bb
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #22811 from crh0716/1052557

Bug 1052557 - Remove the redundant href atribute r=eragonj

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https://hg.mozilla.org/integration/gaia-central/rev/91f3b2106718
Author: Arthur Chen <crh0716@gmail.com>
Desc: Bug 1052557 - Remove the redundant href atribute

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https://hg.mozilla.org/integration/gaia-central/rev/829d30377032
Author: Rudy Lu <me@rudy.lu>
Desc: Merge pull request #22611 from bubuhuang/bug-1033186

Bug 1033186 - Bosnian keyboard layout.
r=rudylu.

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https://hg.mozilla.org/integration/gaia-central/rev/108acd844032
Author: Bruce Huang <bruhuang@gmail.com>
Desc: Bug 1033186 - Bosnian keyboard layout

Add Bosnian key layout, label “Bs”

Update menuLabel to “Bosanski”
Remove redundant symbol UI defintion

Add as default layout for Bosnian
Bumping manifests a=b2g-bump