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

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https://hg.mozilla.org/integration/gaia-central/rev/0e5dd903f5fe
Author: James Burke <jrburke@gmail.com>
Desc: Merge pull request #22790 from awiss/branding

Bug 1052469 - [email] Update signature default to use proper brand r=jrburke

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https://hg.mozilla.org/integration/gaia-central/rev/2d1c4ba63a69
Author: Alex Wissmann <awiss@wharton.upenn.edu>
Desc: Bug 1052469 - [email] Update signature default to use proper brand
Bumping manifests a=b2g-bump