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

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https://hg.mozilla.org/integration/gaia-central/rev/8de13b7efaf7
Author: Zac <zcampbell@mozilla.com>
Desc: Revert "Bug 1090087 - Add test for saving an image from a webpage"

This reverts commit d0907e612aa9b38daab6a2f3161517d91619f62d.

Conflicts:
	tests/python/gaia-ui-tests/gaiatest/tests/functional/browser/test_browser_save_image.py

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https://hg.mozilla.org/integration/gaia-central/rev/e60d97dda145
Author: Zac <zcampbell@mozilla.com>
Desc: Revert "Bug 1080169 - Update test_sms_with_attachments.py to correlate with the manual test"

This reverts commit 790c4452794bc883539a043ee5e8b425d4522930.
Bumping manifests a=b2g-bump