mce-test: Don't depend on /etc/issue

Some OS such as Clear Linux has no /etc/issue. Print /etc/os-release
instead of /etc/issue.

Signed-off-by: Dezhu Zhang <dezhux.zhang@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
3 files changed