Problem with initramfs-tools support for early firmware loading

[Igor Cher <igorflint@gmail.com>]

Live build option --initramfs-compression = lzma no longer work. The problem is in the 
recently added early firmware loading mechanism. In my case it is for intel-microcode.

Early firmware loading was added since kernel 3.9 and initramfs-tools 0.113. 
If I understood correctly, the main idea is to put uncompressed firmware data 
before compressed initramfs image. So we can't work with such file as with 
usual archive. The result is that /usr/lib/live/build/chroot_hacks script code:

for INITRAMFS in $(find chroot/boot -name 'initrd*'); do
                        zcat "${INITRAMFS}" | lzma -c ${LZMA_OPTIONS} > "${INITRAMFS}.new"
                        mv "${INITRAMFS}.new" "${INITRAMFS}"
done

produces broken initrd image.

I use live build packages from Wheezy distribution, but kernel and it's dependencies from Sid.