FreeBSD: Follow upstream `WIFSIGNALED` change

src/unix/bsd/freebsdlike/dragonfly/mod.rs

@@ -1051,6 +1051,10 @@ f! {
         (_CMSG_ALIGN(::mem::size_of::<::cmsghdr>()) +
             _CMSG_ALIGN(length as usize)) as ::c_uint
     }
+
+    pub fn WIFSIGNALED(status: ::c_int) -> bool {
+        (status & 0o177) != 0o177 && (status & 0o177) != 0
+    }
 }
 
 extern "C" {

src/unix/bsd/freebsdlike/freebsd/mod.rs

@@ -1161,6 +1161,10 @@ f! {
         ::mem::size_of::<sockcred>() + ::mem::size_of::<::gid_t>() * ngrps
     }
 
+    pub fn WIFSIGNALED(status: ::c_int) -> bool {
+        (status & 0o177) != 0o177 && (status & 0o177) != 0 && status != 0x13
+    }
+
     pub fn uname(buf: *mut ::utsname) -> ::c_int {
         __xuname(256, buf as *mut ::c_void)
     }

src/unix/bsd/freebsdlike/mod.rs

@@ -1194,10 +1194,6 @@ f! {
         status >> 8
     }
 
-    pub fn WIFSIGNALED(status: ::c_int) -> bool {
-        (status & 0o177) != 0o177 && (status & 0o177) != 0
-    }
-
     pub fn WIFSTOPPED(status: ::c_int) -> bool {
         (status & 0o177) == 0o177
     }