NMake: Fix linkiing on Rust 1.70.0 or later (for librsvg-2.56 branch)
Hi,
This is the librsvg-2.56
branch counterpart for !842 (merged), for fixing builds using Rust 1.70.0 or later. Basically, we use rustc
to find out what .lib's are needed from the Windows SDK when linking the librsvg DLL in Visual Studio builds.
With blessings, thank you!
Fixes #968 (closed) for the librsvg-2.56
branch