Install the Python DLL with execute priviledge set.  This is required for
Cygwin Python to startup correctly when in ntsec mode.  Cygwin operating in
this mode is probably not the only system with this requirement.
diff --git a/Makefile.pre.in b/Makefile.pre.in
index 2006092..92cb706 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -535,7 +535,7 @@
 	else	true; \
 	fi
 	if test -f "$(DLLLIBRARY)"; then \
-		$(INSTALL_DATA) $(DLLLIBRARY) $(BINDIR); \
+		$(INSTALL_SHARED) $(DLLLIBRARY) $(BINDIR); \
 	else	true; \
 	fi