[joselopeqti]

The specification for CL_EXTERNAL_MEMORY_HANDLE_OPAQUE_FD_KHR describes the ownership transfer for the file descriptor:

For these extensions, importing memory from a file descriptor transfers ownership of the file descriptor from the application to the OpenCL implementation. The application must not perform any operations on the file descriptor after a successful import. The imported memory object holds a reference to its payload.

Therefore, if the first import is successful, that fd should belong to the OpenCL implementation and the application should not use it again to import the memory.
This change moves the successful imports to the end of the test, so the file descriptor ownership is correct.