[Issue 17027] Add support for tzcnt and lzcnt in x86(64) iasm

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17027

b2.temp at gmx.com changed:

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

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