cocci: add script for zero-length arrays in structs

cocci: add script for zero-length arrays in structs

Add script to replace [0] with [] when used at the end of a struct.
The script also includes an additional struct member to match against so
as to avoid issues with arrays with only a single zero-length element.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: Morten Brørup <mb@smartsharesystems.com>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Hemant Agrawal <hemant.agrawal@nxp.com>