Auto merge of #2464 - devnexen:posix_spawn_consts_netbsd, r=JohnTitor

netbsd add missing posix_spawn constants.

Author: bors

libc-test/semver/netbsd.txt

@@ -740,6 +740,13 @@ POSIX_MADV_NORMAL
 POSIX_MADV_RANDOM
 POSIX_MADV_SEQUENTIAL
 POSIX_MADV_WILLNEED
+POSIX_SPAWN_RESETIDS
+POSIX_SPAWN_RETURNERROR
+POSIX_SPAWN_SETPGROUP
+POSIX_SPAWN_SETSCHEDPARAM
+POSIX_SPAWN_SETSCHEDULER
+POSIX_SPAWN_SETSIGDEP
+POSIX_SPAWN_SETSIGMASK
 PTHREAD_CREATE_DETACHED
 PTHREAD_CREATE_JOINABLE
 PTHREAD_MUTEX_DEFAULT

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

@@ -1957,6 +1957,14 @@ pub const PT_GET_EVENT_MASK: ::c_int = 17;
 pub const PT_GET_PROCESS_STATE: ::c_int = 18;
 pub const PT_FIRSTMACH: ::c_int = 32;
 
+pub const POSIX_SPAWN_RESETIDS: ::c_int = 0x01;
+pub const POSIX_SPAWN_SETPGROUP: ::c_int = 0x02;
+pub const POSIX_SPAWN_SETSCHEDPARAM: ::c_int = 0x04;
+pub const POSIX_SPAWN_SETSCHEDULER: ::c_int = 0x08;
+pub const POSIX_SPAWN_SETSIGDEF: ::c_int = 0x10;
+pub const POSIX_SPAWN_SETSIGMASK: ::c_int = 0x20;
+pub const POSIX_SPAWN_RETURNERROR: ::c_int = 0x40;
+
 // Flags for chflags(2)
 pub const SF_SNAPSHOT: ::c_ulong = 0x00200000;
 pub const SF_LOG: ::c_ulong = 0x00400000;