Removes the last dependency on liblxqt

liblxqt as being used to set the version only.
Dropping it. The version is now set in the CMakelist.txt file.

Signed-off-by: Luís Pereira <luis.artur.pereira@gmail.com>
Fixes an typo in an CMakeList.txt variable

Signed-off-by: Luís Pereira <luis.artur.pereira@gmail.com>