Also output --network for testing http server commandline
Also output --network for testing http server commandline

If for instance running ddc kernel tests via

tools/test.py -mrelease -cdartdevk language_2 -v

one is told that a http server is started with a command line that will
create a http server listening to 0.0.0.0, while generally the one
actually launched by the testing scripts only listen to 127.0.0.1.

This CL adds the extra --network output to the command line given.

Bug:
Change-Id: Ifd9278360efb0b12249fe866c49ed923f7e73b0e
Reviewed-on: https://dart-review.googlesource.com/24102
Reviewed-by: Alexander Thomas <29642742b6693024c89de8232f2e2542cf7eedf7@google.com>
Commit-Queue: Jens Johansen <05223a3c6bdf76af6f84755eae231abeebcf4530@google.com>

dart-lang/sdk,dart-archive/dart-sdk,dartino/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dart-lang/sdk,dartino/dart-sdk,dartino/dart-sdk,dartino/dart-sdk,dart-lang/sdk,dartino/dart-sdk,dartino/dart-sdk,dartino/dart-sdk,dart-lang/sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dart-archive/dart-sdk,dart-lang/sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dartino/dart-sdk,dart-lang/sdk,dart-archive/dart-sdk