add prlimit syscall wrapper

src/misc/prlimit.c

@@ -0,0 +1,8 @@
+#include <unistd.h>
+#include <sys/resource.h>
+#include "syscall.h"
+
+int prlimit(pid_t pid, int resource, const struct rlimit *new_limit, struct rlimit *old_limit)
+{
+	return syscall(SYS_prlimit64, pid, resource, new_limit, old_limit);
+}