Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/08ef2514a1aa
Author: Carsten Book -Tomcat- <cbook@mozilla.com>
Desc: Revert "Bug 960861 - mozMobileConnections should not be requisites for airplane mode" for suspicion of breaking marionette tests

This reverts commit abd710def22c5244dfa8959b15ca49954a58e12c.

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https://hg.mozilla.org/integration/gaia-central/rev/9fcac81be0ab
Author: Arnau <arnau@arnaumarch.com>
Desc: Merge pull request #17321 from pacorampas/973547

Bug 973547 - Enter device name overlay has a wrong layout.

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https://hg.mozilla.org/integration/gaia-central/rev/1a7947ed3ee4
Author: Paco Rampas <pacorampas@gmail.com>
Desc: Bug 973547 - Enter device name overlay has a wrong layout.
Bumping manifests a=b2g-bump