patch 8.0.0248: vim_strcat() cannot handle overlapping arguments

Problem:    vim_strcat() cannot handle overlapping arguments.
Solution:   Use mch_memmove() instead of strcpy(). (Justin M Keyes,
            closes #1415)
diff --git a/src/version.c b/src/version.c
index 199c37d..1125992 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    248,
+/**/
     247,
 /**/
     246,