When installing the "python" link in bindir also test for a pre-existing
symlink and remove it.
diff --git a/Makefile.pre.in b/Makefile.pre.in
index 985e73e..6d1af49 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -560,7 +560,7 @@
 
 # Install the interpreter (by creating a hard link to python$(VERSION))
 bininstall:	altbininstall
-	-if test -f $(BINDIR)/$(PYTHON); \
+	-if test -f $(BINDIR)/$(PYTHON) -o -L $(BINDIR)/$(PYTHON); \
 	then rm -f $(BINDIR)/$(PYTHON); \
 	else true; \
 	fi