The current setup, where gtest/libxul uses the static library in
the same directory as the shared libxul, and somehow the backend ignores
gkrust for gtest/libxul, is fragile.

Differential Revision: https://phabricator.services.mozilla.com/D42246

--HG--
rename : toolkit/library/dependentlibs.py => toolkit/library/build/dependentlibs.py
extra : moz-landing-system : lando