bug_chomper: Make server's port configurable.

bug_chomper: Make server's port configurable.

Make 'port' a flag so you can change it from the command line, making the
server more flexible and allowing us to change in which port it listen
to requests.

$ ./run_server.sh --port :8002

BUG=None
TEST=see above
R=borenet@google.com

Committed: https://skia.googlesource.com/skia/+/a658d368defdc9b3dd176b8cfd018aaf061fe9a2

[tfarina, 2014-10-11 02:30:55]

Is this OK?

[borenet, 2014-10-13 13:06:45]

LGTM

[tfarina, 2014-10-13 13:51:38]

The CQ bit was checked by tfarina@chromium.org

[commit-bot: I haz the power, 2014-10-13 13:52:36]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/649663003/1

[commit-bot: I haz the power, 2014-10-13 14:53:18]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-10-13 14:53:20]

Try jobs failed on following builders:
  Build-Mac10.8-Clang-x86_64-Release-Trybot on client.skia.compile
(http://build.chromium.org/p/client.skia.compile/builders/Build-Mac10.8-Clang-...)

[tfarina, 2014-10-13 14:59:58]

The CQ bit was checked by tfarina@chromium.org

[commit-bot: I haz the power, 2014-10-13 15:00:57]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/649663003/1

[commit-bot: I haz the power, 2014-10-13 19:43:07]

Committed patchset #1 (id:1) as a658d368defdc9b3dd176b8cfd018aaf061fe9a2