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

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https://hg.mozilla.org/integration/gaia-central/rev/d59efab557e3
Author: evanxd <itoyxd@gmail.com>
Desc: Merge pull request #13338 from evanxd/bug-925961

Bug 925961 - [B2G][Email] Receiver's email address displays as "null" after saving, editing, and then saving the draft again

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https://hg.mozilla.org/integration/gaia-central/rev/49fe87470a10
Author: Evan Xd <itoyxd@gmail.com>
Desc: Bug 925961 - Use the email address parser for showing bubble properly.