Don't use Linux TCP headers

We can use the netinet headers and get the same functionality, and it
doesn't break Mac.

Change-Id: I645250e9c49ced2297e132e22132a57a220a7806
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/curl/+/388803
Reviewed-by: Brett Wilson <brettw@google.com>
diff --git a/lib/curl_config.h.host b/lib/curl_config.h.host
index 3fa1784..3fcc3bb 100644
--- a/lib/curl_config.h.host
+++ b/lib/curl_config.h.host
@@ -473,7 +473,7 @@
 #define HAVE_LIBZ 1
 
 /* Define to 1 if you have the <linux/tcp.h> header file. */
-#define HAVE_LINUX_TCP_H 1
+/* #undef HAVE_LINUX_TCP_H */
 
 /* if your compiler supports LL */
 #define HAVE_LL 1