Update vboot submodule to upstream main

Updating from commit id 32402941:
2024-01-08 19:53:43 +0000 - (treewide: Put the static keyword at the beginning of declarations)

to commit id 3d37d2aa:
2024-01-15 06:21:04 +0000 - (Makefile: Support FIRMWARE_ARCH=mock for firmware unit tests)

This brings in 2 new commits:
3d37d2aa Makefile: Support FIRMWARE_ARCH=mock for firmware unit tests
ffe3fb20 make_keyblock: Add support for omitting extension

Change-Id: I30425f0c50caf24800661568da8f72f6b4418d9c
Signed-off-by: Yu-Ping Wu <yupingso@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80006
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yidi Lin <yidilin@google.com>
diff --git a/3rdparty/vboot b/3rdparty/vboot
index 3240294..3d37d2a 160000
--- a/3rdparty/vboot
+++ b/3rdparty/vboot
@@ -1 +1 @@
-Subproject commit 32402941c0afdb5bf50d6e3c11548ecb1ac80544
+Subproject commit 3d37d2aafe1f941c532def2a1fbbb58c8dd84182