Allow for customizing the path to ldconfig

Since the `createContainer` `runc` hook runs with the environment that
the container's config.json specifies, the path to `ldconfig` may not be
easily resolvable if the host environment differs enough from the
container (e.g. on a NixOS host where all binaries are under hashed
paths in /nix/store with an Ubuntu container whose PATH contains
FHS-style paths such as /bin and /usr/bin). This change allows for
specifying exactly where ldconfig comes from.

Signed-off-by: Jared Baur <jaredbaur@fastmail.com>

pkg/nvcdi/lib.go

@@ -48,6 +48,7 @@ type nvcdilib struct {
 	driverRoot         string
 	devRoot            string
 	nvidiaCTKPath      string
+	ldconfigPath       string
 	librarySearchPaths []string
 
 	csvFiles          []string