patch 8.1.1672: "make cmdidxs" doesn't work

Problem:    "make cmdidxs" doesn't work.
Solution:   Update macro names. (Naruhiko Nishino, closes #4660)
diff --git a/src/version.c b/src/version.c
index 9825924..ea5de7d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -778,6 +778,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1672,
+/**/
     1671,
 /**/
     1670,