patch 8.1.0873: list if distributed files does not include matchit autoload

Problem:    List if distributed files does not include the matchit autoload
            directory.
Solution:   Add the directory.

Author: brammool

Filelist

@@ -664,6 +664,7 @@ RT_ALL =	\
 		runtime/pack/dist/opt/matchit/plugin/matchit.vim \
 		runtime/pack/dist/opt/matchit/doc/matchit.txt \
 		runtime/pack/dist/opt/matchit/doc/tags \
+		runtime/pack/dist/opt/matchit/autoload/*.vim \
 		runtime/pack/dist/opt/shellmenu/plugin/shellmenu.vim \
 		runtime/pack/dist/opt/swapmouse/plugin/swapmouse.vim \
 		runtime/pack/dist/opt/termdebug/plugin/termdebug.vim \

src/version.c

@@ -783,6 +783,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    873,
 /**/
     872,
 /**/