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

dsriram/golang,dsriram/golang,apparentlymart/golang,tv42/old-go,gnanderson/go,apparentlymart/golang,gnanderson/go,tv42/old-go,apparentlymart/golang,gnanderson/go,apparentlymart/golang,gnanderson/go,dsriram/golang,pombredanne/go-deleteme,pombredanne/go-deleteme,gnanderson/go,tv42/old-go,apparentlymart/golang,dsriram/golang,dsriram/golang,pombredanne/go-deleteme,pombredanne/go-deleteme,tv42/old-go,apparentlymart/golang,apparentlymart/golang,gnanderson/go,pombredanne/go-deleteme,dsriram/golang,tv42/old-go,tv42/old-go,pombredanne/go-deleteme,gnanderson/go,tv42/old-go,dsriram/golang,pombredanne/go-deleteme