Cygwin: enable the use of Dl_info and dladdr()
These weren't available in Cygwin at the time our DSO code was
written, but things have changed since.
Fixes
# endif
# include <dlfcn.h>
# define HAVE_DLINFO 1
-# if defined(__CYGWIN__) || \
- defined(__SCO_VERSION__) || defined(_SCO_ELF) || \
+# if defined(__SCO_VERSION__) || defined(_SCO_ELF) || \
(defined(__osf__) && !defined(RTLD_NEXT)) || \
(defined(__OpenBSD__) && !defined(RTLD_SELF)) || \
defined(__ANDROID__)
