patch 8.1.0732: cannot build without the eval feature

Problem:    Cannot build without the eval feature.
Solution:   Make a copy of the sourced file name.
diff --git a/src/version.c b/src/version.c
index d7c610b..092077f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -796,6 +796,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    732,
+/**/
     731,
 /**/
     730,