handle/managed: Implement non-copyable handle

This is a generic handle type that holds a resource and uses RAII to
call a user defined function when the resource is destroyed. A future
change will implement a smart file descriptor based on this interface.

A follow up change will implement the copyable version.

Tested:
    Built and run through unit tests.

Change-Id: Ia8da1d662319e8fb58380ed4979bcf1b74f66dfb
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/src/Makefile.am b/src/Makefile.am
index 5e935f4..57af82a 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -4,5 +4,7 @@
 libstdplus_la_SOURCES =
 libstdplus_la_LIBADD = $(COMMON_LIBS)
 
+nobase_include_HEADERS += stdplus/handle/managed.hpp
+
 nobase_include_HEADERS += stdplus/signal.hpp
 libstdplus_la_SOURCES += stdplus/signal.cpp