Thou shall not build on unix.

I am turning xpinstall install off on unix until we figure out the
linking problem that all components are having.
donm approved.

xpinstall/Makefile.in

@@ -30,7 +30,7 @@ VPATH		= @srcdir@
 
 include $(DEPTH)/config/autoconf.mk
 
-DIRS = public src
+DIRS = public
 
 include $(topsrcdir)/config/config.mk