Deepin gmux backlight fix

This is a fix for the problem described here: https://bbs.deepin.org/forum.php?mod=viewthread&tid=141241

I did the test under Deepin 15.9.2 only with the intel_backlight.

Install from the pre-built deb-package:

you will find the deb-file in the folder 'noarch'

sudo dpkg -i noarch/*.deb

Install from the sources:

You will need the rpm and alien to build the .deb and .rpm packages:

sudo apt-get install rpm alien

Now you can run the make script:

make

Install the packages:

sudo dpkg -i noarch/*.deb