Reproduction steps

(1) Enable Coco Code Coverage

Expected behavior
Additional CMake options would be compiler-specific cocoplugin.cmake, not the plain cocoplugin.cmake, based on the selected Qt Kit.

Actual Behavior

The plain cocoplugin.cmake is filled instead.

Rationale

In the documentation(https://doc.qt.io/coco/support-for-build-automation-systems.html#cmake), it writes:

There is a generic file, squishcoco.cmake, and specific setting files (like squishcoco-gcc.cmake) that specifies the compiler. The settings file is then included when the project is configured with CMake, with a command line like

cmake <other options> -Csquishcoco-gcc.cmake

Then the project is configured for code coverage. 

In fact, I faced a problem with the default behavior of Qt Creator where the compiler and the linker were not properly configured for coco wrappers. The issue was resolved after I changed the line to include the compiler-specific cocoplugin.cmake.