Copy header files from the main commonlib/bsd to libpayload output installation directory. Change-Id: Idc7175240f3077ec98280331f9a952310aae4341 Signed-off-by: Jakub Czapiga <jacz@semihalf.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/59916 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Georgi <patrick@coreboot.org>