* libltdl/ltdl.h (lt_dlinfo): Move private module field to here...

* libltdl/ltdl.h (lt_dlinfo): Move private module field to here...
* libltdl/ltdl.c (lt_dlhandle_struct): ...from here.  Changed all
callers.
* libltdl/loader-loadlibrary.c (sys_wll_open): Use new inteface to
scan loaded handle->info.module fields for previously loaded
modules.
* doc/libtool.texi (User defined module data): Document changes to
the interface.
* NEWS: Updated.
Reported by Chuck Wilson <cwilson@ece.gatech.edu>