[libdmapsharing] Update doc/Makefile.am to remove some more files on distclean

[W. Michael Petullo <wmpetullo src gnome org>]

commit e50c5976edf25d449da67d810d9411a8162f1e92
Author: W. Michael Petullo <mike flyn org>
Date:   Wed Mar 21 00:09:15 2018 -0400

    Update doc/Makefile.am to remove some more files on distclean
    
    Signed-off-by: W. Michael Petullo <mike flyn org>

 doc/Makefile.am |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/doc/Makefile.am b/doc/Makefile.am
index 4c136b9..559f03c 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -114,7 +114,10 @@ EXTRA_DIST +=
 # Files not to distribute
 # for --rebuild-types in $(SCAN_OPTIONS), e.g. $(DOC_MODULE).types
 # for --rebuild-sections in $(SCAN_OPTIONS) e.g. $(DOC_MODULE)-sections.txt
-#DISTCLEANFILES +=
+DISTCLEANFILES = \
+       libdmapsharing-4.0-overrides.txt \
+       libdmapsharing-4.0-sections.txt \
+       libdmapsharing-4.0.types
 
 # Comment this out if you want your docs-status tested during 'make check'
 if ENABLE_GTK_DOC