Auto merge of #2408 - devnexen:netbsd_flags_string, r=Amanieu

netbsd add string_to_flags api

Author: bors

libc-test/semver/netbsd.txt

@@ -1146,6 +1146,7 @@ fchdir
 fchflags
 fdatasync
 fdopendir
+flags_to_string
 fmemopen
 forkpty
 freeifaddrs
@@ -1367,6 +1368,7 @@ srand
 stack_t
 strcasecmp
 strcasestr
+string_to_flags
 strncasecmp
 strndup
 strpct

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

@@ -2388,6 +2388,13 @@ extern "C" {
         tpe: ::c_int,
     );
 
+    pub fn string_to_flags(
+        string_p: *mut *mut ::c_char,
+        setp: *mut ::c_ulong,
+        clrp: *mut ::c_ulong,
+    ) -> ::c_int;
+    pub fn flags_to_string(flags: ::c_ulong, def: *const ::c_char) -> ::c_int;
+
     pub fn kinfo_getvmmap(pid: ::pid_t, cntp: *mut ::size_t) -> *mut kinfo_vmentry;
 }