[modules] Add forgotten test case to r265597.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@265599 91177308-0d34-0410-b5e6-96231b3b80d8

Author: vgvassilev

test/Modules/Inputs/PR27186/Rtypes.h

@@ -0,0 +1,2 @@
+#include <stddef.h>
+typedef struct timespec timespec_t;

test/Modules/Inputs/PR27186/module.modulemap

@@ -0,0 +1,5 @@
+module "Rtypes.h" { header "Rtypes.h" }
+module a [extern_c] {
+  header "stddef.h"
+  header "time.h"
+}

test/Modules/Inputs/PR27186/stddef.h

@@ -0,0 +1 @@
+

test/Modules/Inputs/PR27186/time.h

@@ -0,0 +1 @@
+struct timespec;

test/Modules/pr27186.cpp

@@ -0,0 +1,7 @@
+// RUN: rm -rf %t
+// RUN: %clang_cc1 -std=c++11 -I%S/Inputs/PR27186  -I%S/Inputs/PR27186/subdir/ -verify %s
+// RUN: %clang_cc1  -nostdsysteminc -std=c++11 -fmodules  -fmodule-map-file=%S/Inputs/PR27186/module.modulemap -fmodules-cache-path=%t -I%S/Inputs/PR27186/ -verify %s
+
+#include "Rtypes.h"
+
+// expected-no-diagnostics