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

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https://hg.mozilla.org/integration/gaia-central/rev/5f908040949f
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Merge pull request #10618 from Rik/stk-error-886844

Bug 886844 - icc.json should be written in the system app r=kaze

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https://hg.mozilla.org/integration/gaia-central/rev/7c80acdfdcfc
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Bug 886844 - icc.json should be written in the system app