patch 8.1.0780: terminal test fails on Mac

Problem:    Terminal test fails on Mac.
Solution:   Skip the test on Mac.
diff --git a/src/version.c b/src/version.c
index f6f3b3a..946a6a2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -792,6 +792,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    780,
+/**/
     779,
 /**/
     778,