Build folder generated in the wrong path

[carloscp3009]

I updated the robotology-superbuild but when building it, the robot-log-visualizer build folder was created inside the robotology-superbuild/src/robot-log-visualizer/ instead of robotology-superbuild/build/.... which caused some problems taking some files from the previous build and the new build.

Usually when something fails during compilation the robotology-superbuild/build/ folder can be deleted to get a clean installation later. The current path of the build folder difficult this.