dhcp: install dhclient to /sbin

Debian ifupdown uses an explicit call to /sbin/dhclient.
Busybox ifupdown uses the search path.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/dhcp/dhcp.mk

@@ -59,7 +59,7 @@ define DHCP_INSTALL_CLIENT
 	mkdir -p $(TARGET_DIR)/var/lib
 	(cd $(TARGET_DIR)/var/lib; ln -snf /tmp dhcp)
 	$(INSTALL) -m 0755 -D $(DHCP_DIR)/client/dhclient \
-		$(TARGET_DIR)/usr/sbin/dhclient
+		$(TARGET_DIR)/sbin/dhclient
 	$(INSTALL) -m 0644 -D package/dhcp/dhclient.conf \
 		$(TARGET_DIR)/etc/dhcp/dhclient.conf
 	$(INSTALL) -m 0755 -D package/dhcp/dhclient-script \