No need to run llvm-as. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224859 91177308-0d34-0410-b5e6-96231b3b80d8
Band-aid fix for PR22032: don't emit DWARF debug info if AddressSanitizer is enabled on Windows

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224860 91177308-0d34-0410-b5e6-96231b3b80d8