FROMLIST: test/py: Add base test case for A/B updates

Add sandbox test for 'ab_select' command.

Test: ./test/py/test.py --bd sandbox --build -k test_ab

Bug: 137034204
Change-Id: Ie00652f2be2f4d798a5fb3bb22cc1f9bf1470395
Link: https://patchwork.ozlabs.org/patch/1128010/
Signed-off-by: Ruslan Trofymenko <ruslan.trofymenko@linaro.org>
Signed-off-by: Igor Opaniuk <igor.opaniuk@gmail.com>
Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Reviewed-by: Alistair Strachan <astrachan@google.com>
Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Alistair Delva <adelva@google.com>
2 files changed