[cros_update_firmware] Clean portage metadata cache before emerge the board's firmware package
BUG=b:122467913,b:122583794
TEST=build pacakges, modify chromeos-config/yaml/config.yaml, run cros_update_firmware passes
Change-Id: Ia25688adb83caebef9d8cd835707b324889fb488
Reviewed-on: https://chromium-review.googlesource.com/1428419
Commit-Ready: Ned Nguyen <nednguyen@google.com>
Tested-by: Ned Nguyen <nednguyen@google.com>
Reviewed-by: Ned Nguyen <nednguyen@google.com>
Reviewed-by: YH Lin <yueherngl@chromium.org>
(cherry picked from commit 6d6cd60beaa38d986e60cd7ec099ca8567848ce4)
Reviewed-on: https://chromium-review.googlesource.com/c/1475260
Commit-Queue: Chris Zhou <chris_zhou@compal.corp-partner.google.com>
Tested-by: Chris Zhou <chris_zhou@compal.corp-partner.google.com>
1 file changed
