Make soft links in src for module source files, if built in to the executable. This ensures that those files are built with the same compiler flags as all other source files. See these xemacs-beta messages: <CAHCOHQn+q=Xuwq+y68dvqi7afAP9f-TdB7=8YiZ8VYO816sjHg@mail.gmail.com> <f5by5ejqiyk.fsf@calexico.inf.ed.ac.uk>

--- Xmd.h~	Thu Jun 08 23:20:40 1995
+++ Xmd.h	Sun Mar 16 13:09:10 1997
@@ -150,8 +150,9 @@
 typedef CARD16		BITS16;
 typedef CARD8		BYTE;
 
+#ifndef WIN32
 typedef CARD8           BOOL;
-
+#endif