coreboot-sdk: Add C++ frontend

There's a use case for it now, so add it.

BUG=b:191368705
TEST=builds successfully

Change-Id: I1f8f1a0d63122523d2dcb087300ddc4a85a7b1a0
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/chromiumos-overlay/+/2965175
Reviewed-by: Patrick Georgi <pgeorgi@chromium.org>
Tested-by: Patrick Georgi <pgeorgi@chromium.org>
Commit-Queue: Patrick Georgi <pgeorgi@chromium.org>
1 file changed