CHAMELEON_PREC_X not taken into account in cmake tests

The CMake tests do not properly consider the precision specified by the user through the CHAMELEON_PREC_* variables. It leads to the ctest command failing.

Steps to reproduce

• Configure chameleon using CHAMELEON_PREC_* : cmake -Bbuild -DCHAMELEON_PREC_Z=off
• Compile the project : cmake --build build
• Run the failing ctest command : ctest --test-dir build -R z