images: rootfs.yml.in: Add custom /etc/securetty file

The standard /etc/securetty provided by busybox doesn't contain the ttyTCU0
needed by Nvidia Jetson Xavier NX. This commit adds a custom /etc/securetty
file through the rootfs.yml.in so it will not be overwritten by any other
file provided by other packages.

This change was already pushed upstream to Alpine's aports project:
https://gitlab.alpinelinux.org/alpine/aports/-/commit/0f36b58bcdd5f00b5a5c3d300c5fdbe382807444

When Alpine's version get bumped, this commit can be dropped.

Signed-off-by: Renê de Souza Pinto <rene@renesp.com.br>

images/rootfs.yml.in

@@ -97,3 +97,29 @@ files:
     metadata: yaml
   - path: /etc/eve-hv-type
     contents: 'EVE_HV'
+  - path: /etc/securetty
+    contents: |
+      console
+      tty0
+      tty1
+      tty2
+      tty3
+      tty4
+      tty5
+      tty6
+      tty7
+      tty8
+      tty9
+      tty10
+      tty11
+      hvc0
+      ttyS0
+      ttyS1
+      ttyS2
+      ttyAMA0
+      ttyAMA1
+      ttyTCU0
+      ttyTHS0
+      ttyTHS1
+      ttymxc0
+      ttymxc2