[asan] Trying to make peace with the Windows bots, take 2

There are some test failures after r243003 and r243004 ("Rename the ABI
versioning symbol to '__asan_version_mismatch_check' instead abusing
'__asan_init'"). See http://reviews.llvm.org/D11004

llvm-svn: 243007

compiler-rt/lib/asan/asan_win_dll_thunk.cc

@@ -219,7 +219,9 @@ extern "C" {
   }
 }
 
-INTERFACE_FUNCTION(__asan_version_mismatch_check)
+extern "C" void __asan_version_mismatch_check() {
+  // Do nothing.
+}
 
 INTERFACE_FUNCTION(__asan_handle_no_return)