Externals: Update libusb to 1.0.23-rc1

Now has support for isochronous transfers in the WinUSB backend,
which may or may not work better than the UsbDk backend.

Externals/libusb/libusb/Makefile.am

@@ -13,10 +13,12 @@ DARWIN_USB_SRC = os/darwin_usb.h os/darwin_usb.c
 OPENBSD_USB_SRC = os/openbsd_usb.c
 NETBSD_USB_SRC = os/netbsd_usb.c
 SUNOS_USB_SRC = os/sunos_usb.c os/sunos_usb.h
-WINDOWS_COMMON_SRC = os/windows_nt_common.h os/windows_nt_common.c \
-                     os/windows_common.h libusb-1.0.rc libusb-1.0.def
-WINDOWS_USB_SRC = os/windows_winusb.h os/windows_winusb.c os/windows_usbdk.h \
-		  os/windows_usbdk.c $(COMMON_WINDOWS_SRC)
+WINDOWS_USB_SRC = libusb-1.0.def libusb-1.0.rc \
+		os/windows_common.h \
+		os/windows_nt_common.h os/windows_nt_common.c \
+		os/windows_nt_shared_types.h \
+		os/windows_usbdk.h os/windows_usbdk.c \
+		os/windows_winusb.h os/windows_winusb.c
 WINCE_USB_SRC = os/wince_usb.h os/wince_usb.c
 HAIKU_USB_SRC = os/haiku_usb.h os/haiku_usb_backend.cpp \
 		os/haiku_usb_raw.h os/haiku_usb_raw.cpp os/haiku_pollfs.cpp
@@ -25,8 +27,8 @@ EXTRA_DIST = $(POSIX_POLL_SRC) $(POSIX_THREADS_SRC) \
 	$(WINDOWS_POLL_SRC) $(WINDOWS_THREADS_SRC) \
 	$(LINUX_USBFS_SRC) $(DARWIN_USB_SRC) \
 	$(OPENBSD_USB_SRC) $(NETBSD_USB_SRC) \
-	$(WINDOWS_COMMON_SRC) $(WINDOWS_USB_SRC) $(WINDOWS_USBDK_SRC) \
-        $(WINCE_USB_SRC) $(HAIKU_USB_SRC) \
+	$(WINDOWS_USB_SRC) $(WINCE_USB_SRC) \
+	$(HAIKU_USB_SRC) \
 	os/linux_udev.c os/linux_netlink.c
 
 if OS_LINUX
@@ -63,7 +65,7 @@ libusb_1_0_la_LIBADD = libusb_haiku.la
 endif
 
 if OS_WINDOWS
-OS_SRC = $(WINDOWS_USB_SRC) $(WINDOWS_COMMON_SRC)
+OS_SRC = $(WINDOWS_USB_SRC)
 
 .rc.lo:
 	$(AM_V_GEN)$(LIBTOOL) $(AM_V_lt) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --tag=RC --mode=compile $(RC) $(RCFLAGS) -i $< -o $@