Don't include setopts.h on mac host

Change-Id: I7323f4e5b97d2c9c71655002056299ef032d6fe2
diff --git a/lib/curl_config.h.host b/lib/curl_config.h.host
index 4552834..120d984 100644
--- a/lib/curl_config.h.host
+++ b/lib/curl_config.h.host
@@ -641,7 +641,7 @@
 /* #undef HAVE_STRNICMP */
 
 /* Define to 1 if you have the <stropts.h> header file. */
-#define HAVE_STROPTS_H 1
+/* #undef HAVE_STROPTS_H */
 
 /* Define to 1 if you have the strstr function. */
 #define HAVE_STRSTR 1