Unbreak win/cross build generate step after #563278.

That change added nacl_loader_unittests to the clang tot bots, but
the win/cross bot sets enable_nacl=false.

TBR=kbr@chromium.org

Bug: 843511
Change-Id: I529df5b574ad904919084fa5534b0911e98c7898
Reviewed-on: https://chromium-review.googlesource.com/1090814
Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#565251}
2 files changed