add Makefile.lite to EXTRA_DIST
diff --git a/doc/Makefile.am b/doc/Makefile.am
index 315e9e0..1423d8c 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -30,4 +30,4 @@
 doc_DATA =  \
 	FLAC.tag
 
-EXTRA_DIST = Doxyfile $(doc_DATA)
+EXTRA_DIST = Doxyfile Makefile.lite $(doc_DATA)