Use "python2" shebang for "newpackage-notify" and "gendummydata.py".

Signed-off-by: Lukas Fleischer <archlinux@cryptocrack.de>

support/schema/gendummydata.py

-#!/usr/bin/python
+#!/usr/bin/python2
 """
 usage: gendummydata.py outputfilename.sql
 """

support/scripts/newpackage-notify

-#!/usr/bin/python -O
+#!/usr/bin/python2 -O
 # This program is intended to be run as a once-a-day cronjob, it 
 # sends a batched email containing the names of all new pacakges in
 # the AUR, added within the last 24 hours, to those who have requested