Change permissions of modules in webkitpy/w3c/ to be non-executable.

These files have no particular need to be executable or to have a shebang line;
they're imported and used by test_importer, which is used by import-w3c-tests.

Review-Url: https://codereview.chromium.org/2006273004
Cr-Commit-Position: refs/heads/master@{#397054}
3 files changed