Hide haxe.Symbol

[RblSb]

Not tested, but should work

See https://api.haxe.org/v/development/haxe/Symbol.html

[Simn]

Should this perhaps just become a private type instead? Not sure how it's being used.

[RblSb]

Symbol used in other class, so cannot be private i guess

haxe/std/hl/_std/haxe/Exception.hx

Line 12 in 765abfa

@:noCompletion var __nativeStack:hl.NativeArray<#if (hl_ver >= "1.12.0") haxe.NativeStackTrace.Symbol #else hl.Bytes #end>;