patch 8.0.0815: terminal window not correctly updated

Problem:    Terminal window not correctly updated when 'statusline' invokes
            ":sleep". (NIkolay Pavlov)
Solution:   Clear got_int.  Repeat redrawing when needed.
diff --git a/src/version.c b/src/version.c
index 54ee61f..33e7e3d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    815,
+/**/
     814,
 /**/
     813,