Update to gradle-2.4-20150121230028+0000

Change-Id: I01c340b6e97824dfa2cd6f42e27a95b89374fb2a
diff --git a/wrapper/gradle-wrapper.properties b/wrapper/gradle-wrapper.properties
index 02148ef..a71c5dd 100644
--- a/wrapper/gradle-wrapper.properties
+++ b/wrapper/gradle-wrapper.properties
@@ -3,5 +3,4 @@
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions-snapshots/gradle-2.2-20140925010517+0000-bin.zip
-
+distributionUrl=../../external/gradle/gradle-2.4-20150121230028+0000-bin.zip