[AWS] AWS fixes for windows x64

[Pascal Obry]

Wiljan,

> I have updated some sources to make AWS work on windows x64.
> Can you integrate these changes ?

I had a look. I do not see the point of the
templates_parser--configuration__aws.ads changes in this context?

Also we cannot modify the aws-os_lib.ads directly which is generated. I
have a new check_config.c that does the right thing.

> With these changes, my code runs flawless on x86 and x86-x64.

Great! Thanks.

Pascal.

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