[c++2a] Implement semantic restrictions for 'export' declarations.

llvm-svn: 358932
diff --git a/clang/test/CXX/module/module.interface/Inputs/header.h b/clang/test/CXX/module/module.interface/Inputs/header.h
new file mode 100644
index 0000000..f2e2cbb
--- /dev/null
+++ b/clang/test/CXX/module/module.interface/Inputs/header.h
@@ -0,0 +1,3 @@
+extern int foo;
+namespace bar { extern int baz(); }
+static int baz;