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

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https://hg.mozilla.org/integration/gaia-1_4/rev/f3a4d8380224
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #18590 from viorelaioia/bug_1000176

Bug 1000176 - [v1.4] Investigate and fix failure in test_sms_with_attach...

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https://hg.mozilla.org/integration/gaia-1_4/rev/cf896135434e
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Bug 1000176 - [v1.4] Investigate and fix failure in test_sms_with_attachments
Bumping manifests a=b2g-bump