patch 9.0.1613: some make output gets picked up by 'errorformat'

Problem:    Some make output gets picked up by 'errorformat'.
Solution:   Ignore make output by default. (Gregory Anders, closes #12481)
diff --git a/src/version.c b/src/version.c
index a0c6893..466209b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1613,
+/**/
     1612,
 /**/
     1611,