payloads/tianocore: Init submodules

Recent changes to upstream edk2 necessitate ensuring
that Tianocore's submodules exist and are up to date,
otherwise building UefiPayloadPkg will fail.

Change method used to detect a dirty tree so that initialized
submodules do not taint the result.

Test: build qemu with Tianocore UefiPayloadPkg option successfully.

Change-Id: Ie2541f048966ec0666d8196508ccdb6c5f089de6
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40590
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

0 files changed, 0 insertions, 0 deletions