oeqa/utils/decorators: LogResults fix race condition in linkfile
In order to avoid race condition when test if exists the linkfile
use bb.utils.lock, the best solution is to create a unique name
for the link file.
There is no way to create a unique linkfile name at this decorator
because is needed the machine and image variables, those variables
can't be passed easily in this code.
To avoid broke test export functionality use a try/except because bb
isn't available when use test export
[YOCTO #10225]
Signed-off-by: Aníbal Limón <anibal.limon@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
