faft: Get verbose output from 'mosys platform name'

In rare circumstance 'mosys platform name' fails to retrieve platform
name. We need verbose output to know why. This change should not add any
extra output when mosys works correctly.

BUG=chrome-os-partner:16078
TEST=Make sure tests still work. Change the command to 'platform mame'
and see the verbose error from mosys in test log.

Change-Id: I5181273476d8b1c27fd2c7d03966d69a9c6410d7
Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/37804
Reviewed-by: Tom Wai-Hong Tam <waihong@chromium.org>
1 file changed