[PATCH v2 3/3] port_fwd, util: Include additional headers to fix build with musl

[Stefano Brivio <sbrivio@redhat.com>]

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>
---
 port_fwd.c | 2 ++
 util.h     | 1 +
 2 files changed, 3 insertions(+)

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"
diff --git a/util.h b/util.h
index 1f02588..86f1a7e 100644
--- a/util.h
+++ b/util.h
@@ -10,6 +10,7 @@
 #include <stdarg.h>
 #include <stdbool.h>
 #include <string.h>
+#include <signal.h>
 
 #include "log.h"
 
-- 
@@ -10,6 +10,7 @@
 #include <stdarg.h>
 #include <stdbool.h>
 #include <string.h>
+#include <signal.h>
 
 #include "log.h"
 
-- 
2.39.2