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

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https://hg.mozilla.org/integration/gaia-central/rev/ce8105637fd2
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Revert "Bug 925961 - Use the email address parser for showing bubble properly."

This reverts commit e363d38cde26a6416cb9926c04896866bba4b88a.

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https://hg.mozilla.org/integration/gaia-central/rev/a3d2ce41d386
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Revert "Bug 924274 - [Contacts] Add initial marionette tests"

This reverts commit fec050c7f463ec9645c69158027a5998b293ea99.