sane-backends: update to 1.0.24 and fix configure

	- bump to 1.0.24
	- get rid of shipped libtool
	- remove host include paths from configure macros
	- do not patch generated configure
	- refresh patches

Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/packages@39460 3c298f89-4303-0410-b956-a3cf2f4a3e73
tiff: fix autoreconf

Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/packages@39461 3c298f89-4303-0410-b956-a3cf2f4a3e73