calling $ on enum value crashes nimony

[blackmius]

import std / syncio
type A = enum
    off, on
  LevelSetting = array[0..3, A]
var level: LevelSetting
for x in level:
  echo $x

unhandled exception src/lib/nifstreams.nim(233, 3) n.kind in {Symbol, SymbolDef} [AssertionDefect]

[ringabout]

Two bugs

• semEnumToStr needs to call skipModifier
• echo somehow resolves EnumToStrX differently while let temp = $x; echo temp works properly