Update .travis.yml

Fix broken travis builds. There was a new Ant release so the mirrors updated.
diff --git a/.travis.yml b/.travis.yml
index 6651957..5ff8935 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -40,8 +40,8 @@
     - wget -q $JDK_URL && tar xzf OpenJDK*.tar.gz
     - mv jdk8* jdk
     - export JAVA_HOME=`pwd`/jdk
-    - wget -q https://mirrors.netix.net/apache/ant/binaries/apache-ant-1.10.8-bin.tar.gz && tar xzf apache-ant-*-bin.tar.gz
-    - export ANT_HOME=`pwd`/apache-ant-1.10.8
+    - wget -q https://mirrors.netix.net/apache/ant/binaries/apache-ant-1.10.9-bin.tar.gz && tar xzf apache-ant-*-bin.tar.gz
+    - export ANT_HOME=`pwd`/apache-ant-1.10.9
     - export PATH="$JAVA_HOME/bin:$ANT_HOME/bin:$PATH"
     - java -version
     - ant -version