travis: move make -j flag out of script

Because global environment variables can be overridden when .travis.yml
is processed by the docker-travis target, the effect of this patch is
that docker-travis now obeys the "J=n" option.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
1 file changed