Add opterr and optopt to Windows headers

Until now we only had optind defined in the header.

Since we are using the BSD getopt variant add opterr and optopt.

Fixes: 3ec06ea ("ovn-nbctl: Initial support for daemon mode.")

Signed-off-by: Alin Gabriel Serdean <[email protected]>
Acked-by: Ben Pfaff <[email protected]>

Author: aserdean

include/windows/getopt.h

@@ -33,7 +33,7 @@
 #include <unistd.h>
 
 extern char *optarg;
-extern int optind;
+extern int optind, opterr, optopt;
 
 /*
  * Gnu like getopt_long() and BSD4.4 getsubopt()/optreset extensions