end processing options on zip cmd

Avoids name with dashes becoming options, i.e.

    $ tree .
    .
    ├── -a
    └── a

    0 directories, 2 files

    $ zip -rq a.zip *

    zip error: Invalid command arguments (short option 'a' not supported)

    $ zip -rq a.zip -- *

    $ ls
    -a  a  a.zip

Change-Id: I3992026c75c280d24d7641d2cef4c5cf7ad70c2f
Signed-off-by: Leonardo Sandoval <leonardo.sandoval@linaro.org>
1 file changed