bind: Include delv in the bind-tools package

delv is a tool for sending DNS queries and validating the results, using the
same internal resolver and validator logic as named.

Signed-off-by: Noah Meyerhans <frodo@morgul.net>

net/bind/Makefile

@@ -203,6 +203,7 @@ define Package/bind-tools/install
 	$(INSTALL_DIR) $(1)/usr/bin
 	$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/bin/dig $(1)/usr/bin/
 	$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/bin/host $(1)/usr/bin/
+	$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/bin/delv $(1)/usr/bin/
 	$(INSTALL_DIR) $(1)/usr/sbin
 	$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/sbin/dnssec-keygen $(1)/usr/sbin/
 	$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/sbin/dnssec-settime $(1)/usr/sbin/