autotest (graphics): fix dEQP log parsing

Use ISO-8859-1 encoding to prevent failed XML parsing of dEQP log.

BUG=chrome-os-partner:42991
test_that -b oak --results_dir=./log <IP> f:.*graphics_dEQP/control.gles2.functional.hasty

Change-Id: Ie360d64dc1d638d5a6973fde12887fead959e9e2
Signed-off-by: HS Liao <hs.liao@mediatek.com>
Reviewed-on: https://chromium-review.googlesource.com/295520
Commit-Ready: Ilja Friedel <ihf@chromium.org>
Tested-by: Ilja Friedel <ihf@chromium.org>
Reviewed-by: Ilja Friedel <ihf@chromium.org>
1 file changed