Accept gradle Terms of Service

Issue gh-94

build.gradle

@@ -21,3 +21,10 @@ allprojects {
 		}
 	}
 }
+
+if (hasProperty('buildScan')) {
+	buildScan {
+		termsOfServiceUrl = 'https://gradle.com/terms-of-service'
+		termsOfServiceAgree = 'yes'
+	}
+}