TargetMachine: Make the win32-macho workaround more specific.

This is to avoid problems with win32 + ELF which surprisingly happens a
lot in practice: If a user just specifies -march on the commandline the
object format changes along with the architecture to ELF in many
instances while the OS stays with the default/host OS.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@283151 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed