patch 8.1.2074: test for SafeState autocommand is a bit flaky

Problem:    Test for SafeState autocommand is a bit flaky.
Solution:   Add to list of flaky tests.
diff --git a/src/version.c b/src/version.c
index 6f8107c..2b1438c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -758,6 +758,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2074,
+/**/
     2073,
 /**/
     2072,