this script is large enough to warrant a proper main() func instead of an inline while loop.  plus it has the advantage of `local` working in that func scope.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/platform2/+/971cb6578b7836f6c2e9572e7c15b67008d0280b

commit 971cb6578b7836f6c2e9572e7c15b67008d0280b
Author: Guenter Roeck <groeck@chromium.org>
Date: Thu Dec 07 13:09:33 2017

power: suspend_stress_test: Drop local variable declaration

suspend_stress_test fails with the following error when running on
recent versions of dash.

/usr/bin/suspend_stress_test: 164: local: not in a function

The variable is only used in global context, so it is not necessary
to declare it as local variable.

BUG= chromium:792587 
TEST=Run 'suspend_stress_test -c 5000 --wake_min=10 --wake_max=10
	--memory_check --noerrors_fatal --nocrc_fatal -i "rtc_cmos"'

Change-Id: Ic55334c82119344a52a06fd2f4c109869f1bc4a7
Signed-off-by: Guenter Roeck <groeck@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/811831
Reviewed-by: Dan Erat <derat@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>

[modify] https://crrev.com/971cb6578b7836f6c2e9572e7c15b67008d0280b/power_manager/tools/suspend_stress_test

Please add affected OSs.

Approving merge to M64 Chrome OS.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/platform2/+/053acf7f24bee4bbbf0049f13e0371adf608b4a1

commit 053acf7f24bee4bbbf0049f13e0371adf608b4a1
Author: Guenter Roeck <groeck@chromium.org>
Date: Thu Dec 07 20:44:25 2017

power: suspend_stress_test: Drop local variable declaration

suspend_stress_test fails with the following error when running on
recent versions of dash.

/usr/bin/suspend_stress_test: 164: local: not in a function

The variable is only used in global context, so it is not necessary
to declare it as local variable.

BUG= chromium:792587 
TEST=Run 'suspend_stress_test -c 5000 --wake_min=10 --wake_max=10
	--memory_check --noerrors_fatal --nocrc_fatal -i "rtc_cmos"'

Change-Id: Ic55334c82119344a52a06fd2f4c109869f1bc4a7
Signed-off-by: Guenter Roeck <groeck@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/811831
Reviewed-by: Dan Erat <derat@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
(cherry picked from commit 971cb6578b7836f6c2e9572e7c15b67008d0280b)
Reviewed-on: https://chromium-review.googlesource.com/815136

[modify] https://crrev.com/053acf7f24bee4bbbf0049f13e0371adf608b4a1/power_manager/tools/suspend_stress_test

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