<NME> gradle-wrapper.properties
<BEF> distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-2.11-all.zip

<MSG> Upgrade to Gradle 2.12

<DFF> @@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.11-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.12-all.zip

Upgrade to Gradle 2.12