package/conmon: fix compile when using a static build

This is a new Buildroot package and this is the first build error
the autobuild servers found. It is not part of any Buildroot release
so no need to backport.

Patch removes dlfcn.h, because it is unused.

Fixes:
 - http://autobuild.buildroot.net/results/db3/db301e9f556592828800fa663f2549f430adb58f

Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/conmon/0001-remove-unused-dlfcn.h-header-file.patch

@@ -0,0 +1,26 @@
+From e28634a0e847a14c58482f962bc9b1d69937387f Mon Sep 17 00:00:00 2001
+From: Waldemar Brodkorb <wbx@openadk.org>
+Date: Sat, 12 Aug 2023 12:53:37 +0200
+Subject: [PATCH] remove unused dlfcn.h header file
+
+Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
+Upstream: https://github.com/containers/conmon/issues/443
+---
+ src/seccomp_notify.c | 1 -
+ 1 file changed, 1 deletion(-)
+
+diff --git a/src/seccomp_notify.c b/src/seccomp_notify.c
+index 8d34d9d..2a8371d 100644
+--- a/src/seccomp_notify.c
++++ b/src/seccomp_notify.c
+@@ -7,7 +7,6 @@
+ 
+ #include <errno.h>
+ #include <sys/ioctl.h>
+-#include <dlfcn.h>
+ #include <sys/wait.h>
+ #include <sys/mount.h>
+ #include <signal.h>
+-- 
+2.39.2
+