Added a check for <scsi/scsi.h> and include it in dlls/ntdll/cdrom.c.

diff --git a/configure.ac b/configure.ac
index 5e05122..f7197d7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1021,6 +1021,7 @@
 	regex.h \
 	sched.h \
 	scsi/sg.h \
+	scsi/scsi.h \
 	scsi/scsi_ioctl.h \
 	socket.h \
 	stdint.h \