Build is packaged as uncompressed tar archive but file name ends with .gz

This breaks my build scripts. Did work fine with 3.5.2-alpha

Using 7-Zip on Windows I got a warning, but the archive was extracted fine.

On Linux, tar -xzf exits with an error code, as it pipes through gunzip, which encounters an invalid file (seems to be a pure tar archive).

Hence the huge file size