* updated libusb (1.0.8 -> 1.0.9)


git-svn-id: https://svn.exactcode.de/t2/trunk@43295 c5f82cb5-29bc-0310-9cd0-bff59a50e3bc
	* build sane-backends with libusb-1.0 support, if installed


git-svn-id: https://svn.exactcode.de/t2/trunk@43296 c5f82cb5-29bc-0310-9cd0-bff59a50e3bc
	* update 7zip 9.20 -> 9.20.1

git-svn-id: https://svn.exactcode.de/t2/trunk@43297 c5f82cb5-29bc-0310-9cd0-bff59a50e3bc
	* update libgsf 1.14.21 -> 1.14.30

git-svn-id: https://svn.exactcode.de/t2/trunk@43298 c5f82cb5-29bc-0310-9cd0-bff59a50e3bc