python2: bump to 2.7.3

Pyhton 2.7.3 includes several security fixes.
See: http://www.python.org/download/releases/2.7.3/



Also fixes the patch making sqlite optional and remove the symlink patch
(which has been fixed upstream).

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>