patch 8.2.1078: highlight and match functionality together in one file

Problem:    Highlight and match functionality together in one file.
Solution:   Move match functionality to a separate file. (Yegappan Lakshmanan,
            closes #6352)
diff --git a/src/Make_morph.mak b/src/Make_morph.mak
index ce615b2..bd95115 100644
--- a/src/Make_morph.mak
+++ b/src/Make_morph.mak
@@ -72,6 +72,7 @@
 	main.c							\
 	map.c							\
 	mark.c							\
+	match.c							\
 	mbyte.c							\
 	memfile.c						\
 	memline.c						\