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

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https://hg.mozilla.org/integration/gaia-central/rev/93f6c433742b
Author: Amir Nissim <amirnissim@gmail.com>
Desc: Merge pull request #14408 from EverythingMe/937536-collection-no-icon

Bug 937536 - [e.me] Custom Collection is generated without an icon [r=ranbena, evyatron]

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https://hg.mozilla.org/integration/gaia-central/rev/217b92aa7fce
Author: Amir Nissim <amirnissim@gmail.com>
Desc: Bug 937536 - [e.me] Custom Collection is generated without an icon [r=ranbena, evyatron]

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https://hg.mozilla.org/integration/gaia-central/rev/251c957cb8f6
Author: Jose Antonio Olivera Ortega <josea.olivera@gmail.com>
Desc: Merge pull request #14529 from jaoo/933203

Bug 933203 - [DSDS] Operator variant logic: APN settings. r=kaze

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https://hg.mozilla.org/integration/gaia-central/rev/486c40f33b9b
Author: Jose Antonio Olivera Ortega <josea.olivera@gmail.com>
Desc: Bug 933203 - [DSDS] Operator variant logic: APN settings