clang-cl: Pass -debug to the linker when using -fsanitize=address

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189496 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index c30c45d..6862e76 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -6569,6 +6569,7 @@
   CmdArgs.push_back("-nologo");
 
   if (getToolChain().getDriver().getOrParseSanitizerArgs(Args).needsAsanRt()) {
+    CmdArgs.push_back(Args.MakeArgString("-debug"));
     SmallString<128> LibSanitizer(getToolChain().getDriver().ResourceDir);
     // FIXME: Handle 64-bit. Use asan_dll_thunk.dll when building a DLL.
     llvm::sys::path::append(