Clarify comments in create_installer_archive.py.

This is a follow-up to https://codereview.chromium.org/63153013/

NOTRY=True
BUG=318950, 246169

Review URL: https://codereview.chromium.org/60233008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@235812 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 235812
[telemetry] Relax timing check in wait_unittest.testWaitAction.

Its current check is inherently flaky, and we've seen failures on some bots.

BUG=None.
TEST=tools/telemetry/run_tests wait_unittest
R=tonyg@chromium.org

Review URL: https://codereview.chromium.org/61213007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@235813 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 235813