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.
diff --git a/Filelist b/Filelist
index 70372b3..cd9cbf3 100644
--- a/Filelist
+++ b/Filelist
@@ -664,6 +664,7 @@
 		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 \
diff --git a/src/version.c b/src/version.c
index 71fd1c1..888bc25 100644
--- a/src/version.c
+++ b/src/version.c
@@ -784,6 +784,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    873,
+/**/
     872,
 /**/
     871,