Corrected the sky130 Makefile to put the special handling of the
GPIO cell with "insert_property.py" below the installation of the
library, or else the file to be modified won't be there. Corrected
a handful of places in the common scripts where "/bin/env" was used
instead of the more common "/usr/bin/env".
diff --git a/common/netlist_to_layout.py b/common/netlist_to_layout.py
index a3d9f51..0c228ef 100755
--- a/common/netlist_to_layout.py
+++ b/common/netlist_to_layout.py
@@ -1,4 +1,4 @@
-#!/bin/env python3
+#!/usr/bin/env python3
#-----------------------------------------------------------------------
# netlist_to_layout.py
#-----------------------------------------------------------------------
