RPM creates a symlink during postrans now

This is because in an upgrade the hook package will be removed after the
toolkit package. During that process the hook package will remove the
binary.
Hence we need to create the symlink at the end of the transaction.
Signed-off-by: NRenaud Gaubert <rgaubert@nvidia.com>

toolkit/rpm/SPECS/nvidia-container-toolkit.spec

@@ -17,6 +17,7 @@ Source3: oci-nvidia-hook.json
 Source4: LICENSE
 
 Obsoletes: nvidia-container-runtime < 2.0.0, nvidia-container-runtime-hook
+Provides: nvidia-container-runtime-hook
 Requires: libnvidia-container-tools >= 0.1.0, libnvidia-container-tools < 2.0.0
 
 %description
@@ -38,7 +39,7 @@ install -m 755 -t %{buildroot}/usr/libexec/oci/hooks.d oci-nvidia-hook
 mkdir -p %{buildroot}/usr/share/containers/oci/hooks.d
 install -m 644 -t %{buildroot}/usr/share/containers/oci/hooks.d oci-nvidia-hook.json
 
-%post
+%posttrans
 ln -sf %{_bindir}/nvidia-container-toolkit %{_bindir}/nvidia-container-runtime-hook
 
 %postun