[Issue 17007] let std.math work in CTFE

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=17007
Issue 17007 depends on issue 20200, which changed state.

Issue 20200 Summary: Make std.math.isPowerOf2 work for floating point numbers in CTFE
https://issues.dlang.org/show_bug.cgi?id=20200

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

--