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

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https://hg.mozilla.org/integration/gaia-central/rev/5667d1479dfd
Author: Carsten Book <tomcat@mozilla.com>
Desc: Merge pull request #21731 from weideng/bug1038516

 [Keyboard][Pinyin] Switch back to default page instead of symbol panel. r=rlu

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https://hg.mozilla.org/integration/gaia-central/rev/1f32d9f3cc94
Author: wdeng <wdeng@mozilla.com>
Desc:  [Keyboard][Pinyin] Switch back to default page instead of symbol panel

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "6dd81ae3ab60efbc8c9c347704e077f21778fd97", 
+    "revision": "5667d1479dfddf721d9fc17110ca547ec03b2dfa", 
     "repo_path": "/integration/gaia-central"
 }