On windows paths with spaces some cipd and depot_tools bootstrap commands were failing due to misquoting or syntax that didn't support such paths.  This ensures that a clean bootstrap on a path such as "C:/Foo Bar/depot_tools" works as expected.

Change-Id: Ib516d16ed7809635369399f3df0eff2269ff6e2b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/3834965Reviewed-by: Josip Sokcevic <sokcevic@google.com>
Commit-Queue: Josip Sokcevic <sokcevic@google.com>