test-appliance: kcs: fix kernel uploading

A recent change added a dependency to determine the architecture type
of the built kernel.  This file wasn't included in the gce-xfstests
test appliance, which broken Kernel Compilation Service's call to
"gce-xfstests upload-kernel".  Include it to fix the KCS.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Fixes: ac16929 ("run-tests/util: fix compatibility with openSUSE's file command")

test-appliance/gce-create-image

@@ -243,6 +243,7 @@ cp ../run-fstests/util/gce-launch-ltm	$kvm_xfs_dir/util/
 cp ../run-fstests/util/gce-ltm-funcs	$kvm_xfs_dir/util/
 cp ../run-fstests/util/gce-setup-cert	$kvm_xfs_dir/util/
 cp ../run-fstests/util/get-config		$kvm_xfs_dir/util/
+cp ../run-fstests/util/kernel-magic		$kvm_xfs_dir/util/
 cp ../run-fstests/util/parse_cli		$kvm_xfs_dir/util/
 cp ../run-fstests/util/parse_opt_funcs	$kvm_xfs_dir/util/
 cp ../run-fstests/config.gce		$kvm_xfs_dir/