Add regression test for PR27699.

llvm-svn: 276469
diff --git a/clang/test/Modules/pr27699.cpp b/clang/test/Modules/pr27699.cpp
new file mode 100644
index 0000000..0a17fcb
--- /dev/null
+++ b/clang/test/Modules/pr27699.cpp
@@ -0,0 +1,9 @@
+// RUN: rm -rf %t
+// RUN: %clang_cc1 -std=c++11 -I%S/Inputs/PR27699 -verify %s
+// RUN: %clang_cc1 -std=c++11 -fmodules -fmodule-map-file=%S/Inputs/PR27699/module.modulemap -fmodules-cache-path=%t -fmodules-local-submodule-visibility -I%S/Inputs/PR27699 -verify %s
+
+#include "Subdir/a.h"
+#include "Subdir/b.h"
+
+// expected-no-diagnostics
+