build: Drop syslog on DISABLE_NET_TESTS=1
build: Drop syslog on DISABLE_NET_TESTS=1

Even if local, it requires communication with a daemon
which may not be available.  This is creating problems
for getting an Ubuntu package going in Launchpad's PPA.

R=golang-dev, rsc
CC=golang-dev
http://codereview.appspot.com/3989062

Committer: Russ Cox <5ad239cb8a44f659eaaee0aa1ea5b94947abe557@golang.org>

tav/go,tav/go,tav/go,tav/go,tav/go,tav/go,tav/go