Clang: Include CFI blacklist in LLVM package.

This will cause us to start packaging cfi_blacklist.txt once
we roll past LLVM r246617.

R=thakis@chromium.org,hans@chromium.org
BUG=464797

Review URL: https://codereview.chromium.org/1323843003

Cr-Commit-Position: refs/heads/master@{#347009}
1 file changed