libusb: convert to autotools infrastructure for host package

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/libusb/libusb.mk

@@ -23,7 +23,7 @@ $(DL_DIR)/$(LIBUSB_SOURCE): $(LIBUSB_PATCH)
 libusb-source: $(DL_DIR)/$(LIBUSB_SOURCE) $(LIBUSB_PATCH)
 
 libusb-unpacked: $(LIBUSB_DIR)/.unpacked
-$(LIBUSB_DIR)/.unpacked: $(STAMP_DIR)/host_autoconf_installed $(STAMP_DIR)/host_automake_installed $(STAMP_DIR)/host_libtool_installed $(DL_DIR)/$(LIBUSB_SOURCE)
+$(LIBUSB_DIR)/.unpacked: host-autoconf host-automake host-libtool $(DL_DIR)/$(LIBUSB_SOURCE)
 	$(LIBUSB_CAT) $(DL_DIR)/$(LIBUSB_SOURCE) | tar -C $(BUILD_DIR) $(TAR_OPTIONS) -
 ifneq ($(LIBUSB_PATCH_FILE),)
 	(cd $(LIBUSB_DIR) && $(LIBUSB_CAT) $(LIBUSB_PATCH) | patch -p1)