File fix-build.patch of Package mingw64-libcapi20

diff --git a/src/capi20.c b/src/capi20.c
index 745aa22..a4119b0 100644
--- a/src/capi20.c
+++ b/src/capi20.c
@@ -19,6 +19,7 @@
 #include <sys/mman.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
+#include <dlfcn.h>
 #include <netdb.h>
 #else
 #include <winsock2.h>