python: fix argv[0] for wrapped console_scripts.

Previously programs would see '.<program>-wrapped' as their program name. This is a workaround
but should be reasonably safe and reliable.

pkgs/development/python-modules/generic/wrap.sh

@@ -26,6 +26,7 @@ wrapPythonProgramsIn() {
             # dont wrap EGG-INFO scripts since they are called from python
             if echo "$i" | grep -v EGG-INFO/scripts; then
                 echo "wrapping \`$i'..."
+                sed -i "$i" -e "/^#\!/a import sys; sys.argv[0] = '$(basename $i)'"
                 wrapProgram "$i" \
                     --prefix PYTHONPATH ":" $program_PYTHONPATH \
                     --prefix PATH ":" $program_PATH