Bumping gaia.json for 2 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/b201c99bbf0b
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #10859 from leob2g/Bug_891299_String_disappear

Bug 891299 - [Dialer] String disapper when using keypad and hide

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https://hg.mozilla.org/integration/gaia-central/rev/aec4e8c211bc
Author: sungwoo.yoon <sungwoo.yoon@lge.com>
Desc: Bug 891299 - [Dialer] String disapper when using keypad and hide

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "eaa7e832a813a00fecee8d9e39bc9f1c448840b4", 
+    "revision": "b201c99bbf0b429b5013f38ba21e777ce4408be2", 
     "repo_path": "/integration/gaia-central"
 }