Updating gradle version

Change-Id: I4f43a45576118572470703668ff3f495a25f3e3c
diff --git a/build.gradle b/build.gradle
index 3cd278d..d777e95 100644
--- a/build.gradle
+++ b/build.gradle
@@ -3,7 +3,7 @@
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.1.0-rc1'
+        classpath 'com.android.tools.build:gradle:2.1.0'
         classpath 'com.google.protobuf:protobuf-gradle-plugin:0.7.0'
     }
 }