Import libusb 1.0.9-rc3 into third_party

third_party/libusb/libusb/Makefile.am

Index: third_party/libusb/libusb/Makefile.am
diff --git a/third_party/libusb/libusb/Makefile.am b/third_party/libusb/libusb/Makefile.am
new file mode 100644
index 0000000000000000000000000000000000000000..22661dccb7b7efa6589c43026a2dab4deb654c89
--- /dev/null
+++ b/third_party/libusb/libusb/Makefile.am
@@ -0,0 +1,40 @@
+lib_LTLIBRARIES = libusb-1.0.la
+
+LINUX_USBFS_SRC = os/linux_usbfs.c
+DARWIN_USB_SRC = os/darwin_usb.c
+WINDOWS_USB_SRC = os/poll_windows.c os/windows_usb.c libusb-1.0.rc
+
+EXTRA_DIST = $(LINUX_USBFS_SRC) $(DARWIN_USB_SRC) $(WINDOWS_USB_SRC) \
+	os/threads_posix.c os/threads_windows.c
+
+if OS_LINUX
+OS_SRC = $(LINUX_USBFS_SRC)
+endif
+
+if OS_DARWIN
+OS_SRC = $(DARWIN_USB_SRC)
+AM_CFLAGS_EXT = -no-cpp-precomp
+endif
+
+if OS_WINDOWS
+OS_SRC = $(WINDOWS_USB_SRC)
+
+.rc.lo:
+	$(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(RC) $(RCFLAGS) -i $< -o $@
+endif
+
+if THREADS_POSIX
+THREADS_SRC = os/threads_posix.h os/threads_posix.c
+else
+THREADS_SRC = os/threads_windows.h os/threads_windows.c
+endif
+
+libusb_1_0_la_CFLAGS = $(VISIBILITY_CFLAGS) $(AM_CFLAGS) $(THREAD_CFLAGS)
+libusb_1_0_la_LDFLAGS = $(LTLDFLAGS)
+libusb_1_0_la_SOURCES = libusbi.h core.c descriptor.c io.c sync.c $(OS_SRC) \
+	os/linux_usbfs.h os/darwin_usb.h os/windows_usb.h \
+	$(THREADS_SRC) \
+	os/poll_posix.h os/poll_windows.h
+
+hdrdir = $(includedir)/libusb-1.0
+hdr_HEADERS = libusb.h