patch 8.1.0382: some make programs can't handle "xdiff/../"

Problem:    Some make programs can't handle dependency on "xdiff/../".
Solution:   Strip it out.
diff --git a/src/version.c b/src/version.c
index 8addd2c..d6a8817 100644
--- a/src/version.c
+++ b/src/version.c
@@ -795,6 +795,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    382,
+/**/
     381,
 /**/
     380,