Ports: Update the CMake platform module from upstream

While we're at it, remove the `/bin/sh` patch that is no longer needed,
as we now build the port fully on the host.

Ports/cmake/patches/0004-cmcurl-Use-struct-stat-and-include-sys-stat.h.patch

@@ -0,0 +1,27 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Ali Mohammad Pur <ali.mpfard@gmail.com>
+Date: Wed, 12 Jan 2022 22:18:23 +0330
+Subject: [PATCH] cmcurl: Use struct stat and include sys/stat.h
+
+For unknown reasons, curl_setup_once.h does not include sys/stat.h. This patch includes sys/stat.h.
+
+- [ ] Local?
+- [ ] Should be merged to upstream?
+- [X] Resolves issue(s) with our side of things
+- [X] Hack
+---
+ Utilities/cmcurl/lib/curl_setup.h | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/Utilities/cmcurl/lib/curl_setup.h b/Utilities/cmcurl/lib/curl_setup.h
+index 7421b670..b06c19d8 100644
+--- a/Utilities/cmcurl/lib/curl_setup.h
++++ b/Utilities/cmcurl/lib/curl_setup.h
+@@ -403,6 +403,7 @@
+ #endif
+ 
+ #ifndef struct_stat
++#  include <sys/stat.h>
+ #  define struct_stat struct stat
+ #endif
+