[Bug other/53928] use tar.xz

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53928

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|                            |6.3.0, 7.1.0
   Target Milestone|8.0                         |6.4
      Known to work|                            |6.4.0, 7.2.0, 8.1.0

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
https://gcc.gnu.org/pub/gcc/releases/gcc-8.1.0/gcc-8.1.0.tar.xz
https://gcc.gnu.org/pub/gcc/releases/gcc-7.2.0/gcc-7.2.0.tar.xz
https://gcc.gnu.org/pub/gcc/releases/gcc-6.4.0/gcc-6.4.0.tar.xz

And backported to the 6, 7 branches at the time.