python-pyrex[-native]: upgrade to 0.9.3.1 fixing compatibility with Python 2.4

This fixes errors like the following:
   TypeError: swig_sources() takes exactly 2 arguments (3 given)

diff --git a/packages/python/python-pyrex-native_0.9.3.bb b/packages/python/python-pyrex-native_0.9.3.1.bb
similarity index 100%
rename from packages/python/python-pyrex-native_0.9.3.bb
rename to packages/python/python-pyrex-native_0.9.3.1.bb

diff --git a/packages/python/python-pyrex_0.9.3.bb b/packages/python/python-pyrex_0.9.3.1.bb
similarity index 100%
rename from packages/python/python-pyrex_0.9.3.bb
rename to packages/python/python-pyrex_0.9.3.1.bb