* fixed: `swiftSupport` was picking iphoneos for m1 arm simulator and failed to link

[dkimitsa]

Problem: linker error like this:

ld: .../swift/iphoneos/libswiftCompatibilityConcurrency.a(CompatibilityConcurrency.cpp.o), building for iOS Simulator, but linking in object file built for iOS, for architecture arm64

Root case: old code that was targeting device if arch is arm. But should also check environment for simulator