In anticipation of further flavors (AVX, AVX-512) going to be added
(which would make the current situation even worse), facilitate
reduction of build time (and hence latency to availability of test
results) via use of make's -j option.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>