fix struct ptrace_thread_state on OpenBSD

Author: semarie

src/unix/bsd/netbsdlike/openbsd/mod.rs

@@ -535,6 +535,7 @@ s! {
 
     pub struct ptrace_thread_state {
         pub pts_tid: crate::pid_t,
+        pub pts_name: [c_char; PT_PTS_NAMELEN as usize],
     }
 
     // search.h
@@ -1490,6 +1491,8 @@ pub const PT_GET_THREAD_FIRST: c_int = 15;
 pub const PT_GET_THREAD_NEXT: c_int = 16;
 pub const PT_FIRSTMACH: c_int = 32;
 
+pub const PT_PTS_NAMELEN: c_int = 32;
+
 pub const SOCK_CLOEXEC: c_int = 0x8000;
 pub const SOCK_NONBLOCK: c_int = 0x4000;
 pub const SOCK_DNS: c_int = 0x1000;