[Reproducible-builds] Reproducible patches for libisoburn and libisofs

[Thomas Schmitt]

Hi

i wrote:
> we could only use the first 528 bytes of the ISO before we have to
> determine the GUID. At 528 begins the CRC32

This is not correct, obviously, as libisofs must look ahead for
computing the CRC32.

I will have to investigate how much head buffering is done and whether
there is enough entropy before the buffered head must be completed.


Have a nice day :)

Thomas