patch 8.1.1860: map timeout test is flaky

Problem:    Map timeout test is flaky.
Solution:   Add test to list of flaky tests.  Increase timeout.
diff --git a/src/version.c b/src/version.c
index 66bd86f..cf96d64 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1860,
+/**/
     1859,
 /**/
     1858,