port_fwd, util: Include additional headers to fix build with musl

lseek() is declared in unistd.h, and stdio.h provides sscanf().
Include these two headers in port_fwd.c.

SIGCHLD, even if used exclusively for clone(), is defined in
signal.h: add the include to util.h, as NS_CALL needs it.

Reported-by: lemmi <lemmi@nerd2nerd.org>
Link: https://github.com/void-linux/void-packages/actions/runs/6999782606/job/19039526604#step:7:57
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>

1 files changed, 2 insertions, 0 deletions

diff --git a/port_fwd.c b/port_fwd.c
index 7943a30..6f6c836 100644
--- a/port_fwd.c
+++ b/port_fwd.c
@@ -17,6 +17,8 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <sched.h>
+#include <unistd.h>
+#include <stdio.h>
 
 #include "util.h"
 #include "port_fwd.h"