Update vboot submodule to upstream master

Updating from commit id 392211f0:
2018-04-23 13:07:25 -0700 - (Update Android signing to support signature scheme v2)

to commit id a32c930e:
2018-12-28 16:14:08 -0800 - (futility: updater: quirks: Support special released SNOW RO)

This brings in 159 new commits.

Change-Id: I7fea9ff1e4109d4dbc979289172191f677438933
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/c/30914
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

1 files changed, 0 insertions, 0 deletions

diff --git a/3rdparty/vboot b/3rdparty/vboot
-Subproject 392211f0358919d510179ad399d8f056180e652
+Subproject a32c930e8c46424a3bba3c296fd78b3e60f50ae