patch 7.4.2154

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

Author: brammool

src/testdir/runtest.vim

@@ -131,7 +131,7 @@ else
 endif
 
 " Names of flaky tests.
-let s:flaky = ['Test_reltime()', 'Test_nb_basic()']
+let s:flaky = ['Test_reltime()', 'Test_nb_basic()', 'Test_communicate()']
 
 " Locate Test_ functions and execute them.
 set nomore

src/version.c

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