patch 8.0.1454: when in silent mode too much output is buffered

Problem:    When in silent mode too much output is buffered.
Solution:   Use line buffering instead of fully buffered. (Brian M. Carlson,
            closes #2537)
diff --git a/src/version.c b/src/version.c
index cd99460..5704074 100644
--- a/src/version.c
+++ b/src/version.c
@@ -772,6 +772,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1454,
+/**/
     1453,
 /**/
     1452,