This updates all references to chromiumos/platform/crosvm to
crosvm/crosvm.
It will also switch ./tools/cl to upload to the new main repository.
BUG=None
TEST=None
Change-Id: I1f71e5d5de2300e57ace1315cb4553f68533d576
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3760903
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Tested-by: Dennis Kempin <denniskempin@google.com>
