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

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https://hg.mozilla.org/integration/gaia-central/rev/9cea78561729
Author: EragonJ <eragonj@eragonj.me>
Desc: Merge pull request #17518 from EragonJ/bug-960861-fix

Bug 960861 - mozMobileConnections should not be requisites for airplane ...

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https://hg.mozilla.org/integration/gaia-central/rev/93ea7f9b5588
Author: EragonJ <eragonj@eragonj.me>
Desc: Merge pull request #15550 from EragonJ/bug-960861

Bug 960861 - mozMobileConnections should not be requisites for airplane ...
Bumping manifests a=b2g-bump