Fixed Maemo build problem with scratchbox

Now it gets the correct Python interpreter, not /scratchbox/tools/bin/python.
# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.
# On branch master
# Your branch is ahead of 'origin/master' by 23 commits.
#
# Changes to be committed:
#   (use "git reset HEAD <file>..." to unstage)
#
#	modified:   Makefile
#	modified:   debian/changelog
#	modified:   debian/rules
#
# Untracked files:
#   (use "git add <file>..." to include in what will be committed)
#
#	HACKING
#	MANIFEST
#	TODO
#	build/
#	debian/files
#	debian/pwnitter.debhelper.log
#	debian/pwnitter.substvars
#	debian/pwnitter/
#	dist/
#	introspectable.py
#	logging.conf
#	simpleclient.py
