GitLab

This CL introduces the class which will log events to a file.
The files are placed in the same location as the host binaries
and are cleaned up when the MSI is uninstalled (or reinstalled).
The host log file name includes the date/time so that a new log
is generated each time the host starts.  I added a symlink called
latest.log which points to the newest file.

Bug: 1144185
Change-Id: I92669a2e05033bec39da75eb02460d776d4fcc19
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2536045
Commit-Queue: Joe Downing <joedow@chromium.org>
Reviewed-by: Jamie Walch <jamiewalch@chromium.org>
Cr-Commit-Position: refs/heads/master@{#827085}