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

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https://hg.mozilla.org/integration/gaia-central/rev/c2c501aa412a
Author: Julien Wajsberg <felash@gmail.com>
Desc: Merge pull request #26112 from julienw/1097912-disable-e10s-for-debug-profiles

Bug 1097912 - can't run unit tests via `./bin/gaia-test` r=ochameau

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https://hg.mozilla.org/integration/gaia-central/rev/3fa515dac929
Author: Julien Wajsberg <felash@gmail.com>
Desc: Bug 1097912 - can't run unit tests via `./bin/gaia-test` r=ochameau
Bumping manifests a=b2g-bump