downloader: simplify hash generation
downloader: simplify hash generation

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Former-commit-id: 7d70561467d5acbe1aec57df3c0271831a0fd435 [formerly ce8b8d058b4b76f9a653ab53b492e98ec7340981] [formerly 33a954cf4a64e4adee1e3d025b2b0593aff3ce5f [formerly ee485cd10319ccf064e987e381fc8158f9df5c42]]
Former-commit-id: 1a59b64d26eac39c28f0eaa9dd115bd0507c3d7b [formerly 9d6fc496ad54770eb86b2838ad3efd60d03ce341]
Former-commit-id: 6713c46f5c9e9e7fd2749a9d6f8b24a1e77657af
PolyJIT/benchbuild,PolyJIT/benchbuild,PolyJIT/benchbuild,PolyJIT/benchbuild