Roll tools/swarming_client/ to e7d8b988423ff1966d64db3ef7ca766296f9b0c1.

$ git log b8aeeaef0..e7d8b9884 --date=short --format='%ad %ae %s' | sed 's/@chromium\.org//'
2014-08-26 vadimsh Fix cacert.pem extraction from zip.
2014-08-26 kmg Add output location on isolateserver to JSON
2014-08-25 vadimsh Make net.url_open reuse connections again.

R=vadimsh@chromium.org
BUG=

Review URL: https://codereview.chromium.org/514173002

Cr-Commit-Position: refs/heads/master@{#292475}

DEPS

@@ -50,7 +50,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling swarming_client
   # and whatever else without interference from each other.
-  'swarming_revision': 'b8aeeaef087fa2571aaaf64a8a8dbec06a0e0e41',
+  'swarming_revision': 'e7d8b988423ff1966d64db3ef7ca766296f9b0c1',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling ANGLE
   # and whatever else without interference from each other.