[travis] Reflects new changes for wip in order to perform CI.

Author: olivier-stasse

travis_custom/custom_before_install

@@ -5,7 +5,8 @@ set -e
 set -x
 set -v
 
-# Add robotpkg 
+# Add robotpkg
+sudo sh -c "echo \"deb [arch=amd64] http://robotpkg.openrobots.org/wip/packages/debian/pub trusty robotpkg\" >> /etc/apt/sources.list "
 sudo sh -c "echo \"deb [arch=amd64] http://robotpkg.openrobots.org/packages/debian/pub trusty robotpkg\" >> /etc/apt/sources.list "
 curl http://robotpkg.openrobots.org/packages/debian/robotpkg.key | sudo apt-key add -