dry run for all common

build

@@ -153,9 +153,7 @@ passing this option multiple times. Default: [{}]
 '''.format(common.default_arch))
 for component in component_names:
     add_bool_arg(parser, component)
-parser.add_argument('--dry-run', default=False, action='store_true', help='''\
-Print the commands that would be run, but don't run them.
-''')
+common.add_dry_run_argument(parser)
 args = parser.parse_args()
 
 # Decide archs.