patch 8.0.1218: writing to freed memory in autocmd

Problem:    Writing to freed memory in autocmd.
Solution:   Make a copy of the tag line. (Dominique Pelle, closes #2245)
diff --git a/src/version.c b/src/version.c
index a84c8e2..1c48ef4 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1218,
+/**/
     1217,
 /**/
     1216,