python-pygtk2: update to 2.10.3

diff --git a/packages/python/python-pygtk2_2.10.0.bb b/packages/python/python-pygtk2_2.10.3.bb
similarity index 100%
rename from packages/python/python-pygtk2_2.10.0.bb
rename to packages/python/python-pygtk2_2.10.3.bb