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

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https://hg.mozilla.org/integration/gaia-central/rev/89b1c8462298
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #19549 from gitmai/bug-1013937-empty-screen-import

Bug 1013937 - Empty screen in import contacts when previously user tries...

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https://hg.mozilla.org/integration/gaia-central/rev/8ef84f04f8ab
Author: mai <mri@tid.es>
Desc: Bug 1013937 - Empty screen in import contacts when previously user tries to export contact.
Bumping manifests a=b2g-bump