crash-reporter: Make use of list_proxies to send crashes via a proxy when appropriate

TEST=Manually ran crash_sender to make sure it would run curl with appropriate --proxy option.  Manually ran curl using proxies from "".  Ran a modified crash_sender manually to make sure it passed the appropriate "--proxy" arguments correctly.

Review URL:

Change-Id: Ie1414fca1a7dbc265d8aad0eea32a736a5d30d54
1 file changed
tree: b1cd7344c6dd0ccb27e529e9f938a2c94ea6add3
  1. crash_reporter/