This change introduces lib/ directory which will be used for classes
that are considered libraries and used by multiple executables.
Change-Id: I3da126778bf5ffdb28d7a3c2b966c85de08ba717
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/4289679
Reviewed-by: Joanna Wang <jojwang@chromium.org>
Commit-Queue: Josip Sokcevic <sokcevic@chromium.org>