Added testing.sgml.

diff --git a/documentation/Makefile.in b/documentation/Makefile.in
index a505f68..6c367b5 100644
--- a/documentation/Makefile.in
+++ b/documentation/Makefile.in
@@ -34,6 +34,7 @@
 	printing.sgml \
 	registry.sgml \
 	running.sgml \
+	testing.sgml \
 	tools.sgml \
 	wine-doc.sgml \
 	winelib-bindlls.sgml \