[vector api] RFR: Add "local" keyword for local variables in functions of scripts

[Yang Zhang (Arm Technology China)]

Hi

There is a local variable and a global variable with the same name in gen-template.sh. To protect global variables' content, "local" keyword is added to all local variables.
Could you please help to review it?

http://cr.openjdk.java.net/~yzhang/vectorapi.shell/webrev.00/

Regards,
Yang