PRESUBMIT: Update PyLint blacklist
PRESUBMIT: Update PyLint blacklist

The PyLint was unnecessary slow due to some directories
that don't belong to our repo.

TESTED=Passing 'git cl presubmit' on Windows.
NOTRY=True

Review URL: https://codereview.webrtc.org/1858633002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#12217}

TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc