Updated Gradle in Travis CI build config

Author: smarek

.travis.yml

@@ -16,7 +16,7 @@ before_install:
   # for gradle output style
   - export TERM=dumb
   # newer version of gradle
-  - wget http://services.gradle.org/distributions/gradle-1.8-bin.zip
+  - wget http://services.gradle.org/distributions/gradle-1.9-bin.zip
   - unzip -qq gradle-1.8-bin.zip
   - export GRADLE_HOME=$PWD/gradle-1.8
   - export PATH=$GRADLE_HOME/bin:$PATH