[Bug target/85100] __builtin_cpu_supports avx does not verify OS supports it

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85100

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
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             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2018-03-28
     Ever confirmed|0                           |1