Attempt to fix stdint/cstdint modules try 2

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@287690 91177308-0d34-0410-b5e6-96231b3b80d8

test/libcxx/modules/cstdint_exports.sh.cpp

@@ -0,0 +1,21 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// REQUIRES: modules-support
+
+// Test that <cstdint> re-exports <stdint.h>
+
+// RUN: %build_module
+
+#include <cstdint>
+
+int main() {
+  int8_t x; ((void)x);
+  std::int8_t y; ((void)y);
+}