setup_sysroot: Replace with a single `install` invocation

No need to run `chown` separatedly, `install` can set the right
ownership from the start.

Signed-off-by: Emanuele Aina <emanuele.aina@collabora.com>

apertis-ospack-basesdk.yaml

@@ -714,7 +714,7 @@ actions:
   - action: run
     description: "Setting up sysroot storage"
     chroot: true
-    script: scripts/setup_sysroot.sh
+    script: install -d -m 0755 -o user -g user /home/sysroot
   {{ end }}
 
   - action: run

apertis-ospack-sdk.yaml

@@ -719,7 +719,7 @@ actions:
   - action: run
     description: "Setting up sysroot storage"
     chroot: true
-    script: scripts/setup_sysroot.sh
+    script: install -d -m 0755 -o user -g user /home/sysroot
   {{ end }}
 
   - action: run

scripts/setup_sysroot.sh

-#!/bin/sh
-
-set -e
-
-echo "I: create sysroot directory on home partition"
-install -d -m 0755 /home/sysroot
-chown user.user /home/sysroot