Hi.

So this is a patch candidate for the .gnu.lto_.lto ELF section.
As mentioned, the section contains information about bytecode version,
compression algorithm used and slim LTO object flag.

One minor issues is that I need to append random suffix to the section:
  [ 6] .gnu.lto_.lto.36e74acfb145b04b PROGBITS        0000000000000000 000086 000008 00   E  0   0  1

That's because of in WPA we load more object files and the hash is used for mapping.

Is the idea of the patch right?
Martin