x86: tools: shell-ify calc_run_size perl-ism

Choked while compiling linux on a lightweight system, i.e. freed from perl.

New script tested with dash shell and bash shell.

V2:
- chocked->choked typo
- early conversion from hexadecimal
- error messages on stderr

Sylvain

Your patches have the same subject. Instead, each subject should describe what each patch is doing. Read Documentation/SubmittingPatches for more info.

Also, do not rush in sending a new version in a day or so but wait a couple of days to give people a chance to take a look and so that you can collect all feedback.

Thanks.

Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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