include: Added isguids.h.

include/Makefile.in

diff --git a/include/Makefile.in b/include/Makefile.in
index 3b08d73..e1d53da 100644
--- a/include/Makefile.in
+++ b/include/Makefile.in
@@ -204,6 +204,7 @@
 	ipifcons.h \
 	iprtrmib.h \
 	iptypes.h \
+	isguids.h \
 	ks.h \
 	ksguid.h \
 	ksmedia.h \