Disable the use of lzma since the alchemy images are zlib compressed and there...

Disable the use of lzma since the alchemy images are zlib compressed and there is a lot of space. Fix makefile error when "touching" zImage.flash.srec


git-svn-id: svn://svn.openwrt.org/openwrt/branches/buildroot-ng/openwrt@4108 3c298f89-4303-0410-b956-a3cf2f4a3e73