patch 8.2.0885: "make shadow" does not link new lua test dir

Problem:    "make shadow" does not link new lua test dir.
Solution:   Also link testdir/testluaplugin. (Elimar Riesebieter)

src/Makefile

@@ -2986,7 +2986,9 @@ shadow:	runtime pixmaps
 				 ../../testdir/samples \
 				 ../../testdir/dumps \
 				 ../../testdir/test83-tags? \
-				 ../../testdir/*.ok .
+				 ../../testdir/*.ok \
+				 ../../testdir/testluaplugin \
+				 .
 
 # After updating Vim new files may have been created, use this to refresh the
 # symbolic links in the shadow directory. This isn't guaranteed to catch all

src/version.c

@@ -746,6 +746,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    885,
 /**/
     884,
 /**/