[cs,lua] FileSystem.fullPath does not resolve symlinks

[Aurel300]

class Symlink {
  static function main() {
    trace(sys.FileSystem.fullPath("test-symlink"));
  }
}

$ pwd
/some/place
$ mkdir example-dir
$ ln -s example-dir test-symlink
$ haxe --main Symlink --cs out
$ mono --version
Mono JIT compiler version 3.2.5 (tarball Mon Dec  9 11:46:29 PST 2013)
...
$ mono out/bin/Symlink.exe
/some/place/test-symlink
$ haxe --main Symlink --lua out.lua
$ lua out.lua
/some/place/test-symlink

(Expected output would be /some/place/example-dir)

Once fixed:

• re-enable the tests marked with this issue number in tests/sys/src/TestUnicode.hx

[jdonaldson]

I have a fix checked in for this, but having some difficulty running sys tests right now.