Merge pull request #3767 from artem-zinnatullin/gradle-wrapper-2.12

1.x: Update Gradle wrapper to 2.12

Author: stevegury

gradle/wrapper/gradle-wrapper.jar

@@ -1,6 +1,6 @@
-#Wed Feb 10 13:01:27 PST 2016
+#Tue Mar 15 03:05:19 MSK 2016
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.11-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.12-bin.zip