patch 7.4.2154

Problem:    Test_communicate() fails sometimes.
Solution:   Add it to the flaky tests.

src/version.c

@@ -763,6 +763,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2154,
 /**/
     2153,
 /**/