Removed libiconv prefix (on OS X) to make encodings compile on OS X.
Removed libiconv prefix (on OS X) to make encodings compile on OS X.

I am not sure since which version OS X does include the libiconv library
without the `lib` prefix. But it seems this is the case for some years
now. If there are ways to check for the OS X version at compile time
this may be needed to support older OS X versions. But I guess thats not
needed for most users working with Nim anyway.

mbaulch/Nim,nanoant/Nim,Matt14916/Nim,singularperturbation/Nim,singularperturbation/Nim,mbaulch/Nim,haiodo/Nim,mbaulch/Nim,Matt14916/Nim,russpowers/Nim,nanoant/Nim,russpowers/Nim,sarvex/Nim-lang,singularperturbation/Nim,dom96/Nim,zachaysan/Nim,tulayang/Nim,russpowers/Nim,dom96/Nim,jsanjuas/Nim,mbaulch/Nim,zachaysan/Nim,jfhg/Nim,zachaysan/Nim,mbaulch/Nim,dom96/Nim,endragor/Nim,haiodo/Nim,Matt14916/Nim,dom96/Nim,zachaysan/Nim,dom96/Nim,haiodo/Nim,sarvex/Nim-lang,jfhg/Nim,haiodo/Nim,jfhg/Nim,Matt14916/Nim,mbaulch/Nim,singularperturbation/Nim,singularperturbation/Nim,sarvex/Nim-lang,haiodo/Nim,tulayang/Nim,haiodo/Nim,jsanjuas/Nim,endragor/Nim,dom96/Nim,endragor/Nim,jsanjuas/Nim,sarvex/Nim-lang,mbaulch/Nim,tulayang/Nim,nanoant/Nim,Matt14916/Nim,singularperturbation/Nim,singularperturbation/Nim,zachaysan/Nim,jfhg/Nim,Matt14916/Nim,endragor/Nim,russpowers/Nim,nanoant/Nim,jfhg/Nim,tulayang/Nim,nanoant/Nim,russpowers/Nim,jsanjuas/Nim,jsanjuas/Nim,nanoant/Nim,endragor/Nim,russpowers/Nim,endragor/Nim,sarvex/Nim-lang,jsanjuas/Nim,jsanjuas/Nim,Matt14916/Nim,zachaysan/Nim,zachaysan/Nim,jfhg/Nim,russpowers/Nim,nanoant/Nim,sarvex/Nim-lang,jfhg/Nim,endragor/Nim,dom96/Nim,haiodo/Nim,tulayang/Nim,tulayang/Nim,sarvex/Nim-lang