Add create-soname-symlinks hook

This change adds a create-soname-symlinks hook that can be used to ensure
that the soname symlinks for injected libraries exist in a container.

This is done by calling ldconfig -n -N for the folders containing the injected
libraries.

This also ensures that libcuda.so is present in the ldcache when the update-ldcache
hook is run.

Signed-off-by: Evan Lezar <elezar@nvidia.com>

cmd/nvidia-ctk/cdi/generate/generate_test.go

@@ -100,6 +100,13 @@ containerEdits:
   - hookName: createContainer
     path: /usr/bin/nvidia-cdi-hook
     args:
+    - nvidia-cdi-hook
+    - create-soname-symlinks
+    - --folder
+    - /lib/x86_64-linux-gnu
+    hookName: createContainer
+    path: /usr/bin/nvidia-cdi-hook
+  - args:
     - nvidia-cdi-hook
     - update-ldcache
     - --folder