Dotnet core fails loading native dlls

When running a dotnet core 2.0 unit test that uses a netstandard 2.0 package that uses HDF.PInvoke, it fails with the following exception:
```
System.TypeInitializationException: The type initializer for 'HDF.PInvoke.H5F' threw an exception. ---> System.DllNotFoundException: Unable to load DLL 'hdf5.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E)
```

HDF.PInvoke adds this to my PATH variable before loading the native dlls:
C:\Users\XXX\.nuget\packages\hdf.pinvoke\1.10.1\lib\bin64

However, the actual binaries are located in:
C:\Users\nohabie\.nuget\packages\hdf.pinvoke\1.10.1\build\bin64

Copying the native dlls to the build of the test "solves" the problem.

Inspect the HDF.PInvoke NuGet package paths shown in the report, especially lib\bin64 and build\bin64, and reproduce the failure with a .NET Core 2.0 unit test using the netstandard 2.0 package. Done means the test loads hdf5.dll from the package without copying native DLLs into the test build.

Written by the indexing model from the issue text.