Upgrade to Gradle 3.4.1

This mainly brings performance improvements.

Change-Id: I7e354555d9eebc3e2663242ed78094ee628bee87
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index 51288f9..1bf166c 100644
--- a/gradle/wrapper/gradle-wrapper.jar
+++ b/gradle/wrapper/gradle-wrapper.jar
Binary files differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 9fd1a70..b961049 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Fri Nov 25 10:51:27 CET 2016
+#Sat Mar 04 13:25:00 CET 2017
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.2.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-3.4.1-all.zip