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

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https://hg.mozilla.org/integration/gaia-central/rev/faf297657d6b
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #18408 from crh0716/997601

Bug 997601 - Save the caller id preferece across reboots r=jaoo

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https://hg.mozilla.org/integration/gaia-central/rev/32ca3b2c7b03
Author: Arthur Chen <crh0716@gmail.com>
Desc: Bug 997601 - Save the caller id preferece across reboots

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "4fa04874d5e865a688322ff1a1e9cc2c9b1df7e3", 
+    "revision": "faf297657d6b0a6f111fae58ae5efd1b7d5829e5", 
     "repo_path": "/integration/gaia-central"
 }