[llvm-cov] Optionally fail on missing binary ID

This adds the --check-binary-id flag that makes sure that an object file
is available for every binary ID mentioned in the given profile. This
should help make the tool more robust in CI environments where it's
expected that coverage mappings should be available for every object
contributing to the profile.

Reviewed By: gulfem

Differential Revision: https://reviews.llvm.org/D144308