package/ntp: fix build with gcc-14

Fixes:
https://autobuild.buildroot.org/results/114/114a81f216b44a00c5de830e21315df68a62987d/

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Signed-off-by: Julien Olivain <ju.o@free.fr>

package/ntp/0006-stime.patch

@@ -0,0 +1,21 @@
+Fix stime build error with gcc-14:
+
+machines.c: In function 'ntp_set_tod':
+machines.c:484:28: error: passing argument 1 of 'stime' from incompatible pointer type [-Wincompatible-pointer-types]
+  484 |                 rc = stime(&tp); /* lie as bad as SysVR4 */
+
+Upstream: https://bugs.ntp.org/show_bug.cgi?id=3981#c2
+
+Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
+
+--- a/libntp/machines.c	2025-05-26 18:21:43 +0000
++++ a/libntp/machines.c	2025-05-26 18:21:43 +0000
+@@ -478,7 +478,7 @@ 
+ #endif /* HAVE_SETTIMEOFDAY */
+ #ifdef HAVE_STIME
+ 	if (rc && (SET_TOD_STIME == tod || !tod)) {
+-		long tp = tvp->tv_sec;
++		time_t tp = tvp->tv_sec;
+ 
+ 		errno = 0;
+ 		rc = stime(&tp); /* lie as bad as SysVR4 */