[S] Change in flashrom[master]: [WIP] test_build.sh: Rework programmer selection using Meson

[Nico Huber (Code Review)]

Attention is currently required from: Felix Singer, Angel Pons.

Nico Huber has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/68068 )

Change subject: [WIP] test_build.sh: Rework programmer selection using Meson
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Patch Set 3:

(1 comment)

Patchset:

PS3:
> Is that file not in a standard format? I wouldn't know, is it python?

It's not python or at least it doesn't like the colons. Not my best
hack job, not my worst either:
```
def option(name, type, value = '', choices = [], description = ''):
    if name == 'programmer':
        for choice in choices:
            print(choice)

exec(open('meson_options.txt').read().replace(':', '='))
```

This would break as soon as we'd have a colon in any programmer option.
Not sure if that matters? Python's tokenizer seems to work in any case,
maybe it would be possible to make the replacement after tokenization.