[llvm-objdump] Add --build-id flag for debuginfod lookups without binary.

Adding a --build-id flag allows handling binaries that are referenced in
logs from remote systems, but that aren't necessarily present on the
local machine. These are fetched via debuginfod and handled as if they
were input filenames.

Reviewed By: jhenderson, MaskRay

Differential Revision: https://reviews.llvm.org/D133992