Update get_swarm_results.py path where it searches for swarm_get_results.py.
Update get_swarm_results.py path where it searches for swarm_get_results.py.

Add search for src/tools/swarming_client.
Remove the fallback to build/third_party/swarm_client. It's not needed anymore.

R=ilevy@chromium.org
BUG=

Review URL: https://chromiumcodereview.appspot.com/20587004

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@213737 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build