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

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https://hg.mozilla.org/integration/gaia-central/rev/fe08cb3ebbe9
Author: Marcus Cavanaugh <m@mcav.com>
Desc: Merge pull request #18058 from mcav/gelam-tarako

Bug 991567 - [Tarako][Email] Email app is killed while downloading an at...

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https://hg.mozilla.org/integration/gaia-central/rev/cb33d701f751
Author: Marcus Cavanaugh <m@mcav.com>
Desc: Bug 991567 - [Tarako][Email] Email app is killed while downloading an attachment. r=asuth
Bumping manifests a=b2g-bump