Fix native library probing under .net core

[radiy]

Fix #1

[bp74]

Thanks for the pull request. I will take a look at this and the other pull request and try to find the best possible solution for the library loading issue under linux, docker, netcore, etc.

[radiy]

Hi, bear in mind that it mr is unrelated to docker, linux etc. It fixes single case of running under shared .net core runtime from dotnet run or dotnet test.