Autobuilder builds periodically and now more frequently have been
failing because of a race between the perf build and the newly
separated libtraceevent - perf tries to link libtraceevent.a, which
hasn't finished building yet in those cases.
This disables the parallel build to prevent that.
Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
