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/split_one_spice.py b/common/split_one_spice.py
index 86a448a..be87d7a 100755
--- a/common/split_one_spice.py
+++ b/common/split_one_spice.py
@@ -1,4 +1,4 @@
-#!/bin/env python3
+#!/usr/bin/env python3
#
# split_one_spice.py --
#
