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

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https://hg.mozilla.org/integration/gaia-central/rev/716b4db65f64
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #22568 from empoalp/bug_1045515

Bug 1045515 - Always highlight missed calls in call log

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https://hg.mozilla.org/integration/gaia-central/rev/4c0214833ff8
Author: David Garcia <davidg@tid.es>
Desc: Bug 1045515 - Always highlight missed calls in call log

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "36ed86b087ffb440567300be85a0b93e49f6a57f", 
+    "revision": "716b4db65f6425fa3c66fa11bdd7d27a373d596a", 
     "repo_path": "/integration/gaia-central"
 }