testing: run GC before each benchmark run.
testing: run GC before each benchmark run.

R=r, rh, gri, rsc
CC=golang-dev
http://codereview.appspot.com/4237055

Committer: Rob Pike <4dc7c9ec434ed06502767136789763ec11d2c4b7@golang.org>

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