Fixup file names for unfortunately renamed urbackupclient.dll => urbackup.dll
Fixup file names for unfortunately renamed urbackupclient.dll => urbackup.dll

uroni/urbackup_backend,uroni/urbackup_backend,uroni/urbackup_backend,uroni/urbackup_backend,uroni/urbackup_backend,uroni/urbackup_backend,uroni/urbackup_backend