[Travis] Install chrpath

.travis.yml

@@ -9,7 +9,7 @@ branches:
 before_install:
   - sudo add-apt-repository ppa:kalakris/cmake -y
   - sudo apt-get update -qq
-  - sudo apt-get install -y cmake
+  - sudo apt-get install -y cmake chrpath
   - sudo apt-get install -y libqt4-dev qt4-dev-tools
 
 script: ctest -S ./CMake/ctkTravisDashboardScript.cmake