Log hostapd stderr and stdout to separate files.

BUG=chromium:393667
TEST=Ran wifi_check5HT40, LowInitialBitrates

Change-Id: Ib153a1a6a2f7bf680d5a873829373118fb7a074b
Reviewed-on: https://chromium-review.googlesource.com/216357
Tested-by: Tien Chang <tienchang@chromium.org>
Reviewed-by: Tien Chang <tienchang@chromium.org>
Commit-Queue: Tien Chang <tienchang@chromium.org>
1 file changed