NetBSD: Account for upstream changes to ptrace with LWP

Deprecate the PT_LWPINFO and PL_EVENT* constants, as well as
`ptrace_lwpinfo`.

Upstream commit: NetBSD/src@4f79a48

(backport <#4782>)
(cherry picked from commit c4a86e0)

Author: tgross35

libc-test/build.rs

@@ -1413,6 +1413,8 @@ fn test_netbsd(target: &str) {
             "__exit_status" => true,
             // FIXME(netbsd): Should be importable but aren't for some reason.
             "Aux32Info" | "Aux64Info" => true,
+            // deprecated, obsolete upstream
+            "ptrace_lwpinfo" => true,
             _ => false,
         }
     });
@@ -1432,6 +1434,9 @@ fn test_netbsd(target: &str) {
             "SIG_DFL" | "SIG_ERR" | "SIG_IGN" => true, // sighandler_t weirdness
             "SIGUNUSED" => true,                       // removed in glibc 2.26
 
+            // deprecated, obsolete upstream
+            "PT_LWPINFO" | "PL_EVENT_NONE" | "PL_EVENT_SIGNAL" | "PL_EVENT_SUSPENDED" => true,
+
             // weird signed extension or something like that?
             "MS_NOUSER" => true,
             "MS_RMT_MASK" => true, // updated in glibc 2.22 and musl 1.1.13

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

@@ -711,6 +711,7 @@ s! {
         pub fae: *mut posix_spawn_file_actions_entry_t,
     }
 
+    #[deprecated(since = "0.2.178", note = "obsolete upstream")]
     pub struct ptrace_lwpinfo {
         pub pl_lwpid: lwpid_t,
         pub pl_event: c_int,
@@ -1502,8 +1503,11 @@ pub const TIME_ERROR: c_int = 5;
 pub const LITTLE_ENDIAN: c_int = 1234;
 pub const BIG_ENDIAN: c_int = 4321;
 
+#[deprecated(since = "0.2.178", note = "obsolete upstream")]
 pub const PL_EVENT_NONE: c_int = 0;
+#[deprecated(since = "0.2.178", note = "obsolete upstream")]
 pub const PL_EVENT_SIGNAL: c_int = 1;
+#[deprecated(since = "0.2.178", note = "obsolete upstream")]
 pub const PL_EVENT_SUSPENDED: c_int = 2;
 
 cfg_if! {
@@ -1884,6 +1888,7 @@ pub const SIGSTKSZ: size_t = 40960;
 pub const REG_ILLSEQ: c_int = 17;
 
 pub const PT_DUMPCORE: c_int = 12;
+#[deprecated(note = "obsolete operation")]
 pub const PT_LWPINFO: c_int = 13;
 pub const PT_SYSCALL: c_int = 14;
 pub const PT_SYSCALLEMU: c_int = 15;