I actually worked around it, it was some MITM proxy that decompresses the gzipped tarball, for some reason, that didn't happen why I tried fetching libelf tarball from https://www.mirrorservice.org/sites/libreboot.org/release/20150518/crossgcc/... but anyway, I was able to build coreboot and I flashed it but it seems that I bricked the board, it showed multiple flash chips and I had to choose, so I picked the first one and everything went alright until I rebooted. I am going to flash it externally now, any tips so I don't screw up this time?
Raiz