doc: Update LTO support status in README.md

[xry111]

No description provided.

[zackw]

With the text as is, it would not be correct to merge this patch until after #109 is merged. The necessary compiler support now exists, but libxcrypt must also be changed to use that support before we can say "LTO is supported".

@xry111 If you would like to revise your change so that it accurately summarizes the present state of affairs (see #24 as well as #109), then I'll consider merging it.

[xry111]

With the text as is, it would not be correct to merge this patch until after #109 is merged. The necessary compiler support now exists, but libxcrypt must also be changed to use that support before we can say "LTO is supported".

@xry111 If you would like to revise your change so that it accurately summarizes the present state of affairs (see #24 as well as #109), then I'll consider merging it.

We are already using that support since 38f7f06, AFAIK. But #109 already contains the wanted README.md change so I'll close this.