runtime: increase stack limit in a test Otherwise the test is flaky. Fixes issue 4698.
runtime: increase stack limit in a test
Otherwise the test is flaky.
Fixes issue 4698.

R=golang-dev, iant
CC=golang-dev
https://codereview.appspot.com/7133071
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go