[tools/Perf] Disable pylint's long line check for urls

Rationale: it's hard to read, copy & paste URLs if they are splitted to multi lines.

Context: https://codereview.chromium.org/1266833004/diff/140001/tools/perf/page_sets/blink_memory_mobile.py#newcode28

Review URL: https://codereview.chromium.org/1306083005

Cr-Commit-Position: refs/heads/master@{#346108}
4 files changed