Added declaration for IMimeInfo interface.

diff --git a/include/Makefile.in b/include/Makefile.in
index 62e1381..ad31ada 100644
--- a/include/Makefile.in
+++ b/include/Makefile.in
@@ -16,6 +16,7 @@
 	docobj.idl \
 	exdisp.idl \
 	mediaobj.idl \
+	mimeinfo.idl \
 	mlang.idl \
 	mmstream.idl \
 	mshtmhst.idl \