patch 8.0.1308: the "Reading from stdin" message may be undesired

Problem:    The "Reading from stdin" message may be undesired and there is no
            easy way to skip it.
Solution:   Don't show the message with --not-a-term was used.

src/version.c

@@ -766,6 +766,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1308,
 /**/
     1307,
 /**/