patch 9.1.0013: Modula2 filetype support lacking

Problem:  Modula2 filetype support lacking
Solution: Improve the Modula-2 runtime support, add additional modula2
          dialects, add compiler plugin, update syntax highlighting,
          include syntax tests, update Makefiles (Doug Kearns)

closes: #6796
closes: #8115

Signed-off-by: Doug Kearns <dougkearns@gmail.com>
Signed-off-by: Benjamin Kowarsch <trijezdci@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/Filelist b/Filelist
index df188e8..d4fbca3 100644
--- a/Filelist
+++ b/Filelist
@@ -818,6 +818,7 @@
 		runtime/plugin/README.txt \
 		runtime/syntax/*.vim \
 		runtime/syntax/README.txt \
+		runtime/syntax/modula2/opt/*.vim \
 		runtime/syntax/shared/*.vim \
 		runtime/syntax/shared/README.txt \
 		runtime/syntax/Makefile \