DLL files are not installed in Windows builds
When building in Windows, the install target does not install the generated DLL files. This is caused because "RUNTIME DESTINATION" is not provided when defining install() for target CMOCKA_SHARED_LIBRARY.
To reproduce:
PS> cmake -DCMAKE_INSTALL_PREFIX="C:\myprefix\" ..
PS> cmake --build . --target install
Note that the DLL file is compiled but not installed.