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

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https://hg.mozilla.org/integration/gaia-central/rev/89293b8665e0
Author: Sergi Mansilla <sergi.mansilla@gmail.com>
Desc: Merge pull request #20581 from sergi/1023888

Bug 1023888 - When exporting contacts via bluetooth and cancelling, an error screen appears r=jmcanterafonseca

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https://hg.mozilla.org/integration/gaia-central/rev/0402aef71fe3
Author: Sergi Mansilla <sergi.mansilla@gmail.com>
Desc: Bug 1023888 - When exporting contacts via bluetooth and cancelling, an error screen appears
Bumping manifests a=b2g-bump