Makefile changes for windows



I am making some progress with xmaxima on windows.  
xmaxima works using the mingw wish84 and I am now 
trying to do the packaging.

I need to update the "gcccopy" stanza in the top level
Makefile.am.  Can I move it to 
interfaces/xmaxima/win32/Makefile.am while I am at it
since it is platform specific ( and ugly :-) )

	David