gdixupdate: Add write syscall to seccomp for arm platform

Allow the write syscall for gdixupdate on arm platform. It was causing policy
violation in firmware update process. write is already allowed in amd64
platform for gdixupdate.

BUG=b:281440627
TEST=emerge-strongbad touch_updater;
     cros deploy ${DUT} touch_updater;
     check the kernel log /var/log/messages.

Change-Id: I9e93654321d8ed3a463f1a9700bb0b4a54068e9a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/touch_updater/+/4506104
Commit-Queue: Bob Moragues <moragues@chromium.org>
Reviewed-by: Bob Moragues <moragues@chromium.org>
Reviewed-by: Henry Barnor <hbarnor@chromium.org>
Tested-by: Xuxin Xiong <xuxinxiong@huaqin.corp-partner.google.com>
Reviewed-by: Zhengqiao Xia <xiazhengqiao@huaqin.corp-partner.google.com>
2 files changed