Since CL [9704](https://go-review.googlesource.com/#/c/9704/), the os/signal tests are failing on Plan 9. ``` --- FAIL: TestSignal (1.01s) signal_plan9_test.go:34: hangup... signal_plan9_test.go:22: timeout waiting for hangup FAIL FAIL os/signal 1.195s ``` http://build.golang.org/log/920e12e956c8f974b0e79fcdd6c0cdb056d4e222
Since CL 9704, the os/signal tests are failing on Plan 9.
http://build.golang.org/log/920e12e956c8f974b0e79fcdd6c0cdb056d4e222