Reverted long double removal

Author: Shillaker

pyconfig-extra.h

@@ -12,8 +12,6 @@
 #undef HAVE_MKNOD
 #undef HAVE_DEVICE_MACROS 
 
-#undef HAVE_LONG_DOUBLE
-
 #undef HAVE_EPOLL
 #undef HAVE_EPOLL_CREATE1
 #undef HAVE_LINUX_VM_SOCKETS_H