patch 8.0.0539: startup test fails on Mac

Problem:    Startup test fails on Mac.
Solution:   Use another term name, "unknown" is known. Avoid a 2 second delay.
diff --git a/src/term.c b/src/term.c
index 75c9fbf..cac47da 100644
--- a/src/term.c
+++ b/src/term.c
@@ -1705,7 +1705,8 @@
 		{
 		    screen_start();	/* don't know where cursor is now */
 		    out_flush();
-		    ui_delay(2000L, TRUE);
+		    if (!is_not_a_term())
+			ui_delay(2000L, TRUE);
 		}
 		set_string_option_direct((char_u *)"term", -1, term,
 								 OPT_FREE, 0);