Bumping gaia.json for 6 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/d8f6110874fc
Author: Jose Antonio Olivera Ortega <josea.olivera@gmail.com>
Desc: Merge pull request #13193 from jaoo/917312

Bug 917312 - [WAP push][Gaia] Support handling client provisioning messages. r=gsvelto

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https://hg.mozilla.org/integration/gaia-central/rev/6c7d27bf2ebc
Author: Jose Antonio Olivera Ortega <josea.olivera@gmail.com>
Desc: Bug 917312 - Part 5: Authenticate server.

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https://hg.mozilla.org/integration/gaia-central/rev/82d79e7f70b2
Author: Jose Antonio Olivera Ortega <josea.olivera@gmail.com>
Desc: Bug 917312 - Part 4: Store new APNs into the settings database.

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https://hg.mozilla.org/integration/gaia-central/rev/486699c0cac4
Author: Jose Antonio Olivera Ortega <josea.olivera@gmail.com>
Desc: Bug 917312 - Part 3: Parse WAP provisioning doc.

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https://hg.mozilla.org/integration/gaia-central/rev/8397f6bcafe8
Author: Jose Antonio Olivera Ortega <josea.olivera@gmail.com>
Desc: Bug 917312 - Part 2: Update UI.

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https://hg.mozilla.org/integration/gaia-central/rev/7f376431eda3
Author: Jose Antonio Olivera Ortega <josea.olivera@gmail.com>
Desc: Bug 917312 - Part 1: Accept client provisioing messages.