[Bug other/61439] contrib/download_prerequisites script does not verify integrity of packages

[moritz at klammler dot eu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61439

--- Comment #5 from Moritz Klammler <moritz at klammler dot eu> ---
Created attachment 37659
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37659&action=edit
Improved version of download_prerequisites script that verifies package
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