[Bug sanitizer/58994] asan.exp regressions on x86_64 darwin at -m64 but not -m32 at r204372

[howarth at nitro dot med.uc.edu]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58994

--- Comment #9 from Jack Howarth <howarth at nitro dot med.uc.edu> ---
(In reply to Alexander Potapenko from comment #8)
> Clang's libclang_rt.asan_osx_dynamic.dylib depends on the Foundation
> framework. When I remove that dependency, ASanified programs crash on the
> same env_ptr assertion.

Should we just add a CoreFoundation linkage to the creation of libasan.1.dylib
in FSF gcc instead?