fd: Implement managed file descriptor support

Change-Id: I0c5c438aa2c31ae52e115951b3fb1e85df182fd1
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/test/fd/dupable.cpp b/test/fd/dupable.cpp
new file mode 100644
index 0000000..2b34f9f
--- /dev/null
+++ b/test/fd/dupable.cpp
@@ -0,0 +1,14 @@
+#include <gtest/gtest.h>
+#include <stdplus/fd/dupable.hpp>
+
+namespace stdplus
+{
+namespace fd
+{
+
+TEST(DupableFd, Noop)
+{
+}
+
+} // namespace fd
+} // namespace stdplus