add watch file (deb package need)

Signed-off-by: Xiangfu Liu <xiangfu.z@gmail.com>

usbboot/debian/watch

@@ -0,0 +1,11 @@
+# Example watch control file for uscan
+# Rename this file to "watch" and then you can run the "uscan" command
+# to check for upstream updates and more.
+# See uscan(1) for format
+
+# Compulsory line, this is a version 3 file
+version=3
+
+# Uncomment to examine a Webserver directory
+http://cloud.github.com/downloads/xiangfu/xburst-tools/xburst-tools_0.0_200906.tar.gz
+