Bumping gaia.json for 1 gaia-central revision(s)
Truncated some number of revisions since the previous bump.

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https://hg.mozilla.org/integration/gaia-central/rev/6175336047b5
Author: Rick Waldron <waldron.rick@gmail.com>
Desc: Bug 882756 - [SMS][MMS] We don't find the correct contact if an incoming SMS has a local/national number a=tests

Signed-off-by: Rick Waldron <waldron.rick@gmail.com>