fvp-docker-images: Make UBL license files available to docker image builds

The "swskt-linaro-root-20240523-165d.lic" file, recently received from
Romain Castell of Arm UBL team, was uploaded to the TuxPut FVP bucket,
and we're going to include it in the FVP docker images.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: Ib21be4cacf7bf083b8ba9e0c56f9fcbe0990dd4e
diff --git a/fvp-docker-images/builders.sh b/fvp-docker-images/builders.sh
index 56b8e99..bd43bf1 100644
--- a/fvp-docker-images/builders.sh
+++ b/fvp-docker-images/builders.sh
@@ -29,6 +29,7 @@
     mkdir -p $tag
     cp setup-sshd stdout-flush-wrapper*.sh $tag/
     mv $tarball $tag/
+    cp swskt-linaro-root*.lic $tag/
     ./create-model-dockerfile.sh $tarball $tag
     (
         set -ex