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

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https://hg.mozilla.org/integration/gaia-central/rev/c7cc7f2cd0af
Author: James Lal <james@lightsofapollo.com>
Desc: Merge pull request #11445 from gaye/bug-903220

Bug 903220 - Write a marionette test for creating a calendar event a=test-only r=lightsofapollo

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https://hg.mozilla.org/integration/gaia-central/rev/1bff6b89fbd9
Author: gaye <gaye@mozilla.com>
Desc: Bug 903220 - Write a marionette test for creating a calendar event a=test-only r=lightsofapollo