Move MathMLNames from Perl to Python

This CL switches MathMLNames from make_names.pl to make_qualified_names.py.

R=eseidel@chromium.org,mrobinson@igalia.com

Review URL: https://codereview.chromium.org/26840003

git-svn-id: svn://svn.chromium.org/blink/trunk@159399 bbb929c8-8fbe-4397-9dbb-9b2b20218538