netbsd-tests: Fix the libc stat_socket test

The test tries to connect a socket to a closed port at 127.0.0.1.  It
sets O_NONBLOCK on the socket first and expects to get EINPROGRESS from
connect(2), but this is not guaranteed, ECONNREFUSED is possible.
Handle both cases, and re-enable the test.

PR:		240621
Sponsored by:	The FreeBSD Foundation

(cherry picked from commit 95c75073d3)

contrib/netbsd-tests/lib/libc/sys/t_stat.c

@@ -350,14 +350,14 @@ ATF_TC_BODY(stat_socket, tc)
 
 	errno = 0;
 
-	ATF_REQUIRE_ERRNO(EINPROGRESS,
-	    connect(fd, (struct sockaddr *)&addr,
-		sizeof(struct sockaddr_in)) == -1);
+	ATF_REQUIRE(connect(fd, (struct sockaddr *)&addr,
+	    sizeof(struct sockaddr_in)) == -1);
+	ATF_REQUIRE(errno == EINPROGRESS || errno == ECONNREFUSED);
 
 	errno = 0;
 
 	if (fstat(fd, &st) != 0 || errno != 0)
-		atf_tc_fail("fstat(2) failed for a EINPROGRESS socket");
+		atf_tc_fail("fstat(2) failed for a socket");
 
 	(void)close(fd);
 }