os_defines.h (_GLIBCXX_THREAD_ATEXIT_WIN32): Define.

os_defines.h (_GLIBCXX_THREAD_ATEXIT_WIN32): Define.

2014-08-19  Yaakov Selkowitz  <yselkowi@redhat.com>
	Kai Tietz  <ktietz@redhat.com>

	* config/os/mingw32-w64/os_defines.h (_GLIBCXX_THREAD_ATEXIT_WIN32):
	Define.
	* config/os/newlib/os_defines.h (_GLIBCXX_THREAD_ATEXIT_WIN32):
	Ditto.
	* libsupc++/atexit_thread.cc [_GLIBCXX_THREAD_ATEXIT_WIN32]:
	#include <windows.h>.
	(struct elt): Add dll member.
	(run): Decrement dll refcount.
	(__cxxabiv1::__cxa_thread_atexit): Increment dll refcount.

Co-Authored-By: Kai Tietz <ktietz@redhat.com>
From-SVN: r214163