[Bug target/89073] x86 __attribute__ ((target("sha"))) not documented

[pocqak at fyvzl dot net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89073

--- Comment #4 from Jacob Nevins <pocqak at fyvzl dot net> ---
Ah, should have looked harder.
Thank you for adding it to the place I looked first.