[code coverage] Fix a bug that coverage tools are downloaded every time

Due to an unnoticed change in the clang_update script, the |cov_path|
and |profdata_path| paths in the update_clang_coverage_tools.py script
don't point to the actual binaries anymore, which results in that the
script download and unpack the coverage tools every time when users try
to run the scripts.

This CL fixes the issue.

Bug: 1006099
Change-Id: Ib9c330e6e57caa49a8ec98762f187cf67d082423
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1868985
Reviewed-by: Max Moroz <mmoroz@chromium.org>
Commit-Queue: Yuke Liao <liaoyuke@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#707509}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 4aebbcde43517c585550adc8aebd093ab8268afd
2 files changed