Doc build has warnings

[LeeTibbert]

While tracing the build log files, I once again noticed a defect in the doc build had first seen and
described in a PR in April, 2020 : it has warnings which reduce confidence that the build is correct.

/native/src/main/scala/org/portablescala/reflect/Reflect.scala:44:3: Could not find any member to link for "org.portablescala.reflect.annotation.EnableReflectiveInstantiation".
[warn]   /** Reflectively looks up an instantiable class.
[warn]   ^
[warn] native/src/main/scala/org/portablescala/reflect/Reflect.scala:6:3: Could not find any member to link for "org.portablescala.reflect.annotation.EnableReflectiveInstantiation".
[warn]   /** Reflectively looks up a loadable module class.
[warn]   ^