patch 8.2.4893: distributed import files are not installed

Problem:    Distributed import files are not installed.
Solution:   Add rules to Makefile and NSIS.
diff --git a/src/version.c b/src/version.c
index 3957325..a99bede 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4893,
+/**/
     4892,
 /**/
     4891,