[CI] unzip update
[CI] unzip update

Launch unzip with -u update flag, useful in interactive shell.

Change-Id: I68e4a91ff0cbecdafca47219539f50dc94227e2a

safchain/skydive,skydive-project/skydive,redhat-cip/skydive,safchain/skydive,skydive-project/skydive,safchain/skydive,safchain/skydive,lebauce/skydive,safchain/skydive,lebauce/skydive,safchain/skydive,skydive-project/skydive,safchain/skydive,safchain/skydive,lebauce/skydive,lebauce/skydive,lebauce/skydive,skydive-project/skydive,lebauce/skydive,redhat-cip/skydive,redhat-cip/skydive,skydive-project/skydive,lebauce/skydive,lebauce/skydive,skydive-project/skydive,skydive-project/skydive