[asan] Add flushes to try to fix test

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@335089 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/asan/TestCases/Windows/user-exception.cc b/test/asan/TestCases/Windows/user-exception.cc
index 6824115..4cff23f 100644
--- a/test/asan/TestCases/Windows/user-exception.cc
+++ b/test/asan/TestCases/Windows/user-exception.cc
@@ -20,7 +20,7 @@
   DWORD exception_code = info->ExceptionRecord->ExceptionCode;
   if (exception_code == EXCEPTION_ACCESS_VIOLATION) {
     fprintf(stderr, "in SEHHandler\n");
-    fflush(stdout);
+    fflush(stderr);
     TerminateProcess(GetCurrentProcess(), 0);
   }
   return EXCEPTION_CONTINUE_SEARCH;
@@ -29,6 +29,7 @@
 int main() {
   SetUnhandledExceptionFilter(SEHHandler);
   fprintf(stderr, "in main\n");
+  fflush(stderr);
 
   volatile int *p = nullptr;
   *p = 42;