Reapply fix for EXPORT_C problem in backend.dll, which got lost in the merge - bug 2971
EXPORTS
CommInit @ 1 NONAME
async_ioctl @ 2 NONAME
async_ioctl_completion @ 3 NONAME
create_thread @ 4 NONAME
start_posix_server @ 5 NONAME
start_thread @ 6 NONAME
td_Close @ 7 NONAME
td_Next @ 8 NONAME
td_Test @ 9 NONAME
td_Title @ 10 NONAME
wait_for_thread @ 11 NONAME
create_process @ 12 NONAME
start_process @ 13 NONAME
wait_for_process @ 14 NONAME
start_redirection_server @ 15 NONAME
td_TestErrno @ 16 NONAME
wait_for_process_id @ 17 NONAME
get_proc_id @ 18 NONAME