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

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https://hg.mozilla.org/integration/gaia-central/rev/5823626437f8
Author: Fernando Campo <fernando.campo@o2.com>
Desc: Merge pull request #14570 from fcampo/mms-message-width-948346

Bug 948346 - MMS when message has multiple lines, it cuts off (r=julienw)

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https://hg.mozilla.org/integration/gaia-central/rev/bf02ef63dd92
Author: Fernando Campo <fernando.campo@o2.com>
Desc: Bug 948346 - MMS when message has multiple lines, it cuts off