Improve sci exec.config (#297)

* cloud hypervisor had debug symbols, hence generally remove them from
  the package list to avoid installing them
* improve quoting in create function

Co-authored-by: Tobias Jungel <1773291+toanju@users.noreply.github.com>

Author: toanju

features/sci/exec.config

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+
 set -Eeuo pipefail
 
 # Undo the gardener feature disablement
@@ -19,6 +20,8 @@ for p in https://github.com/gardenlinux/package-edk2-cloud-hypervisor-gl/release
 done
 
 pushd /tmp/custompackages > /dev/null
+rm -f -- *dbgsym* *arm64* || true
+ls -1
 dpkg -i cloud-hypervisor-gl*_amd64.deb edk2-cloud-hypervisor-gl*_amd64.deb libvirt-clients_*_amd64.deb libvirt-common_*_amd64.deb libvirt-daemon_*_amd64.deb libvirt-daemon-common_*_amd64.deb libvirt-daemon-config-network_*_all.deb libvirt-daemon-config-nwfilter_*_all.deb libvirt-daemon-driver-ch-gl_*_amd64.deb libvirt-daemon-driver-network_*_amd64.deb libvirt-daemon-driver-nodedev_*_amd64.deb libvirt-daemon-driver-nwfilter_*_amd64.deb libvirt-daemon-driver-qemu_*_amd64.deb libvirt-daemon-driver-secret_*_amd64.deb libvirt-daemon-driver-storage_*_amd64.deb libvirt-daemon-log_*_amd64.deb libvirt-daemon-system_*_amd64.deb libvirt0_*_amd64.deb
 popd > /dev/null
 rm -rf /tmp/custompackages
@@ -34,11 +37,11 @@ function create() {
   shift
   ID=$1
   shift
-  adduser --uid $ID --home /var/lib/$NAME $NAME \
+  adduser --uid "$ID" --home "/var/lib/$NAME" "$NAME" \
     --system --group --disabled-password --disabled-login
   echo "$@"
   for group in "$@"; do
-    adduser $NAME $group
+    adduser "$NAME" "$group"
   done
 }