Add the new MIBS to the Makefile

Reported-by: Jeff Forhan <jforhan@cisco.com>

mibs/Makefile.am

@@ -7,6 +7,8 @@ mibs_DATA = \
 	DOCS-BPI-MIB \
 	DOCS-CABLE-DEVICE-MIB \
 	DOCS-CABLE-DEVICE-TRAP-MIB \
+	DOCS-IETF-BPI2-MIB \
+	DOCS-IF3-MIB \
 	DOCS-IF-EXT-MIB \
 	DOCS-IF-MIB \
 	DOCS-QOS-MIB \