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

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https://hg.mozilla.org/integration/gaia-central/rev/58c5d9a326a0
Author: Amir Nissim <amirnissim@gmail.com>
Desc: Bug 1021731 - e.me text suggestions are not showing. r=daleharvey

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https://hg.mozilla.org/integration/gaia-central/rev/b443d579357e
Author: Dale Harvey <dale@arandomurl.com>
Desc: Bug 1022052 - Add setting to disable searching remote provider. r=kgrandon, r=evelyn
Bumping manifests a=b2g-bump