scripts/build-capstan-img: Build GCE image

Signed-off-by: Asias He <asias@cloudius-systems.com>
Signed-off-by: Pekka Enberg <penberg@cloudius-systems.com>

scripts/build-capstan-img

@@ -19,6 +19,7 @@ now=$(date +"%Y-%m-%dT%R:%S")
 out=build/capstan/$name
 qemuimage=build/release/usr.img
 vboximage=build/release/usr.vdi
+gceimage=build/release/osv.tar.gz
 index=$out/index.yaml
 build="make image=$image"
 
@@ -35,8 +36,11 @@ echo "build: $build" >> $index
 $build
 
 qemu-img convert -O vdi $qemuimage $vboximage
+# Generate GCE image
+scripts/gen-gce-tarball.sh
 
 gzip < $qemuimage > $out/$(basename $name).qemu.gz
 gzip < $vboximage > $out/$(basename $name).vbox.gz
+gzip < $gceimage  > $out/$(basename $name).gce.gz
 
 echo "==> '$name' image built to '$out'."