setup: Ensure only Karma tests run on Win32
setup: Ensure only Karma tests run on Win32

Previously, if the Karma tests passed, setup would then proceed to run
the rest of the tests on Win32 that it's not supposed to.

mbland/custom-links,mbland/custom-links,mbland/custom-links,mbland/url-pointers,mbland/url-pointers,mbland/url-pointers