Fix installation path in Linux standalone builds

[reharish]

• Dowloaded and installed deb file from releases.
• The script files are not available on PATH.

Need to fix the installation path or improve the documentation.

Thanks.

[phatpaul]

Also, the linux build instructions are missing this final critical step sudo make install, otherwise, I couldn't find the built binary anywhere.

...
sudo make install
...
Install the project...
-- Install configuration: ""
-- Installing: /usr/local/lib/qt/plugins/canbus/libqtCannelloniCanBusPlugin.so
-- Installing: /usr/local/bin/CANdevStudio

That installed it!