patch 8.2.3256: executable test may fail on new Ubuntu system

Problem:    Executable test may fail on new Ubuntu system.
Solution:   Consider /usr/bin/cat and /bin/cat the same.
diff --git a/src/version.c b/src/version.c
index d8e07b1..2ef5237 100644
--- a/src/version.c
+++ b/src/version.c
@@ -756,6 +756,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3256,
+/**/
     3255,
 /**/
     3254,