patch 8.1.2364: termwinscroll test is flaky on FreeBSD

Problem:    Termwinscroll test is flaky on FreeBSD.
Solution:   Add to list of flaky tests.  Rename function.
diff --git a/src/version.c b/src/version.c
index 1bb77a1..7bc97da 100644
--- a/src/version.c
+++ b/src/version.c
@@ -738,6 +738,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2364,
+/**/
     2363,
 /**/
     2362,