Corrections to create relocatable CMake package (for linux and windows)

[kutij]

Now by calling CMake install, a relocatable CMake package can be created, that

• can contain Release/Debug/MinSizeRel/RelWithDebInfo versions as well, and will be linked appropriately
• can be used via simple find_package (will link the system libraries automatically, copy the additional libraries from the SOEM e.g. WinPCap, these libraries are copied into the package as well)

The generated package can be simply used by calling "find_package(soem)" & "target_link_libraries(projectname soem)"...

The modifications are perfomed for the case of Windows and Linux. Tested on Windows 10 and Ubuntu 22.04.

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