since those old(er) files still use the endianness-depending format.
And remove x64 from the filename...

Change-Id: I24e56cd8561c2ec6a1f77a66907c14cdea8248b6
Reviewed-on: https://gerrit.libreoffice.org/60916
Tested-by: Jenkins
Reviewed-by: Rene Engelhard <rene@debian.org>