Feature Request: Supporting dynlib for dynamic loading
Hello, I was wondering how hard it would be to support the dynlib pragma. I do a fair amount of development and that involves using the Windows API my favorite package is [winim](https://github.com/khchen/winim). For example with something such as [OpenProcess](https://github.com/khchen/winim/blob/d300192c588f73dddef26e3c317f148aa23465c3/winim/inc/winbase.nim#L1964) we can see it is utilizing the dynlib pragma for dynamic loading via LoadLibraryA and GetProcAddress. If I wanted to use this with nlvm would the easiest way be to import dynlib instead and call loadlib and getsymaddr to invoke OpenProcess that way? I could copy kernel32.dll over to my setup with nlvm. However, that is not too feasible as there may be differences between the current Windows version I am using then running it on something such as Windows 7 or Windows 8.

P.S. This is an awesome project and is really useful for something I am working on. 