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

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https://hg.mozilla.org/integration/gaia-2_0/rev/b3f4e0e009fc
Author: Julien Wajsberg <felash@gmail.com>
Desc: Merge pull request #24994 from julienw/1076703-v2.0-fix-dsds-switch

Bug 1076703 - In DSDS mode, switching SIM does not work in the new messa...

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https://hg.mozilla.org/integration/gaia-2_0/rev/8b202c730e76
Author: Julien Wajsberg <felash@gmail.com>
Desc: Bug 1076703 - In DSDS mode, switching SIM does not work in the new message panel r=azasypkin
Bumping manifests a=b2g-bump