Fixing ASan build on Win: don't use __asan_default_options

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@157608 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/asan/asan_rtl.cc b/lib/asan/asan_rtl.cc
index 7884d13..bcdbf24 100644
--- a/lib/asan/asan_rtl.cc
+++ b/lib/asan/asan_rtl.cc
@@ -500,11 +500,13 @@
   // Make sure we are not statically linked.
   AsanDoesNotSupportStaticLinkage();
 
+#if !defined(_WIN32)
   if (__asan_default_options) {
     Report("Using the defaults from __asan_default_options: %s\n",
            __asan_default_options);
     ParseAsanOptions(__asan_default_options);
   }
+#endif
   // flags
   const char *options = AsanGetEnv("ASAN_OPTIONS");
   ParseAsanOptions(options);